Holley Sniper 2 EFI: The #1 Selling EFI Conversion Just Got Better

Visit our Holley.com configurator to shop now and see the latest available features - www.holley.com...
The #1 EFI conversion system just got better! Introducing Sniper 2 EFI - a self-tuning, easy-to-install, EFI conversion for common 4-barrel (4150 flange) style carburetors.
Your Complete Installation Guide To Sniper 2
• Holley Sniper 2 EFI: Y...
We took everything that we learned from the original Sniper EFI system and added 14 new features that will make your EFI conversion more simple, reliable and modern. Like all Sniper EFI systems,
Sniper 2 is designed to work with the Sniper Ecosystem that includes Hyperspark ignition, complete fuel systems, multiple user interfaces/dash displays, and more.
New for Sniper 2 is the optional Power Distribution module (PDM). This cost-effective and optional accessory isolates the core of your EFI and ignition wiring into one, easy-to-use location.
Make your classic drive like a modern fuel injected vehicle, including easy cold starts, smooth drivability and improved fuel economy! Sniper 2 is designed to be installed at home in your garage with limited tools and the support of Holley’s comprehensive installation manual and videos.

[@Stangherbie1234]

I feel they should give all the sniper one customers a huge trade in. Mine’s had bad injectors twice. Apparently it’s a problem or they wouldn’t have mentioned the new connectors on the injectors.

[@jafopt]

Was it leaking fuel like mine?

[@young11984]

Sounds like a stacker system where you get a ecm and everything else is extra money, havent looked into it yet though

[@armygreenfj3924]

Yeah im getting this one..seems so much better than the older version

[@robertpatton7442]

I hope they will do a staggered opening Q-jet type spreadbore, like they did before: to run on 2 small barrels for most cruising and have all the CFM when all 4 barrels open up...with hopefully 500 HP of capacity or more.

[@lostallmymoney2082]

Holley, when will the terminator X be able to support VVT for I6 or V8 engines? Atlas 4200 is begging for an ECM that can control it.

[@AnnDee4444]

Any plans for a Sniper for classic the Chevy inline 6 motors? Rochester B, Carter W-1, Stromberg BX...

[@robert64impala]

Just bought the ( old ) sniper last week 😢

[@SunsetSesh]

Return it maybe?

[@HazeyAuto]

I hope one of the biggest improvements includes E85 compatibility…

[@bigbert1119]

It doesn't

[@Nate75757575]

What kind of upgradability will we have with Sniper 1? I got my Sniper 1 about 2 months ago and would have rather gone with the sniper 2 of we knew this was coming. I just dropped 4k between the efi tank, hyperspark, Sniper 1, and installation cost.

[@skimask5911]

Sniper 1 has no upgradability.

[@noobFab]

Ugggh that's really unfortunate timing. Of course, almost no manufacturer is going to torpedo sales of their outgoing product by announcing the new one too early, however, an upgrade path is what separates the really top tier companies from the 'competent but also ran' ones. Hopefully they either have a trade-in program or at least have a board upgrade planned for version 1 snipers.

[@skimask5911]

@@noobFab Absolutely not, I called about upgrading my sniper one to the model that handles the higher horse. They said the body for the higher horse is much bigger to house the dual injectors.

[@Nate75757575]

@noobFab I hope they due show some buy up trade it option. The part that sucks is that the new sniper is only like 50 bucks more than gen 1. You'd figure with the launch of gen2 that gen 1 would go down in price but it doesn't seem to have.

[@morganwadsworth9275]

I’m in the same boat. Just got mine two months ago….kind of frustrating that Holley didn’t announce a date for the sniper 2 even a year ago and then maybe discount sniper 1’s for those that want a discount on an older model.

[@thenewmejourneyfitnessphot6326]

Will anything from my sniper 1 setup work with this? Also one of the major issues was heat killing the ecu, was anything done to rectify that? I personally went through 2 sniper units.

[@HolleyPerformance]

The ECU has been extensively tested over temperatures exceeding 260F. You'd use everything else from the Sniper 2 system

[@the-dullahan]

The transmission control is great. Is the Sniper 2 going to be available in QuadraJet format, like the first gen Sniper?

[@HolleyPerformance]

Not currently

[@the-dullahan]

@@HolleyPerformance are there plans to perhaps have that in the foreseeable future? I am actually just about to order my unit, for an upcoming project, but I see now that the Sniper II is out and I prefer this model, but would favour the QuadraJet format, if it will be available.

[@armygreenfj3924]

Is the fuel rail pump still extremely loud? Or can i use the Edelbrock sump pump and connect it to the Holley sniper and use my mechanical fuel pump.

[@SunsetSesh]

When are we getting the Quadrajet format?

[@chrisd078]

Do you make any transmission controllers for Chrysler/dodge transmissions?

[@RANDOMNATION907]

Came here to say this exact same thing. I'm building a Magnum 360/410 engine and really want to use a 46RE transmission.

[@JoeSimpsonAtTempest]

awesome

[@MillerMachineWorks]

Wish that Bluetooth deal would work on sniper 1s, the original has never been able to detect my fingers

[@automan1223]

How much does just the throttle body weigh ? Looks like a big chunk of aluminum.

[@stephenhans189]

Heat and vibration is bbbbad for electronics!

[@MSW-uf5zu]

in the updates was something done to rectify issues of ecu heat damage that seemed to be a common complaint with the version one system by alot of owners?

[@HolleyPerformance]

The ECU has been extensively tested over temperatures exceeding 260F

[@skimask5911]

@@HolleyPerformance Its a simple yes or no answer.

[@jamiesilvestro3382]

​@skimask5911 well no it isn't, they clearly stated what it has been test run at meaning temperatures above that aren't recommended. If they said yes then they would have morons like you putting a blow torch to them and complain even further about the heat damage!

[@GbodyMedia]

Damn man this awesome

[@tcwest83]

Very nice. Will the sniper 2 plug into the old sniper's harness plugs?

[@HolleyPerformance]

The harnesses don't interchange, but the wiring plug ins for the vehicle are the same. Meaning the ignition, battery, fuel pump, etc. You can reuse those same connection points.

[@danybeltran928]

@@HolleyPerformance woks in ls engine and msd 6014?

[@67elco]

Can't believe they can't give you the option to get a classic gold color for the throttle body.

[@chrisdaigle5410]

How about making a kit to install 3 two barrel carburetors to replace the Weber carbs on a European or Japanese inline 6 cylinder.

[@the-dullahan]

And on a Pontiac V8 intake. I've been wanting that forever.

[@hndryder3]

Is there a trade in program for the version one to two

[@HolleyPerformance]

Not currently

[@skimask5911]

Hell no, you think Holleys flexible like that? Lmao they want you to spend money.

[@luismiramontes5882]

Does this sniper 2 require a return line to work properly? I want to run a few lines as possible. Can i use the holley regulator/filter part #12-875 with the sniper 2?

[@HolleyPerformance]

If you buy one of our universal returnless tank modules or muscle car modules (vehicle specific fitment) then yes you can run one line up with no regulator inline. The universal returnless module is an option when you're using the configurator, and the muscle car modules can be found here - www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/ignition_and_fuel_systems/muscle_car_efi_modules/

[@wyo_garage20]

@holley I’ll be excited when you guys actually do something and support plug and play Chrysler OD controls. I mean, it’s not difficult; literally lockup and overdrive, everything else is done by itself.

[@mikeydejon2148]

When can I get the harness plug and play for sniper one to sniper 2 I want the kit with fuel regulator also but I guess it’s not available yet !?

[@bigboy501son]

is this going to be available in a marine unit ?

[@mrrustyshackleford62]

why should i buy the sniper 2 system in stead of the aces royal flush system.thanks

[@killerta87]

Holley, will bluetooth module work with the sniper series 1?

[@HolleyPerformance]

Not currently, since it's designed around the new M8 connector for Sniper 2

[@killerta87]

@HolleyPerformance so whats in the new plug? Is there a wiring breakdown and can just replace connector end with a new connector? If it's just power, ground, can high, can low....etc

[@milesaway1980]

@@killerta87 I'd love to know this too. I'd quickly take the bluetooth module for my Sniper 1.

[@HolleyPerformance]

@@killerta87 Sorry not currently backwards compatible

[@GbodyMedia]

Are those injector connectors available for purchase for guys who have the old sniper or terminator x stealth throttle bodies?

[@skimask5911]

Not currently and probably won't be in the future.

[@fonkjam]

@@skimask5911 Oh well but you can fix this yourself by using a small tie strap around the harness connector.

[@ryangreen5977]

There is no hyperspark distributor for the 4.9 i6😕

[@vornice7604]

Soo can I use the 5" touch screen on my terminator x? Or maybe the phone thing?

[@HolleyPerformance]

The 5-inch and Bluetooth module currently isn't supported for Terminator X

[@KurlySilvia]

Sorry im new. I am getting a 6.0 and am trying to figure out why the holley sniper efi would be more benficial than a lsxr or tbss intake. And even when looking for airboxes for these types of applications i cant seem to find a airbox nor a plate to cover the throttle body with.

[@randysrestoration]

Is the Holley Sniper 2 avail for the Ford Motorcraft 2v?

[@joshuagarvey9362]

Holley 4150 I bought 30 years ago still on AFR point.No need for upgrade.

[@jameslinde340]

@Holleyperformance can you please give some more information on the transcontroller (551 103) shown in the video. That product doesnt exist on your website.

[@HolleyPerformance]

We teased it early. Details will come soon

[@TurboRanger351]

Will the Bluetooth be available as an add on or upgrade for the holley super sniper stealth 4150?

[@HolleyPerformance]

Not currently

[@rodrigosilva-jh7gd]

Very Nice

[@LLI550]

Ahhh I just got my sniper efi, then this comes out lol. Haven’t even installed 😢

[@DadbrosGarage]

Man that stinks

[@Nate75757575]

I'm in the same boat. Just bought the Sniper, EFI tank and pump, and hyperspark for this to come out 2 months later. :/

[@LLI550]

@@DadbrosGarage you got some good content, I just subscribed

[@DadbrosGarage]

@lawrencehuff135 wow thanks 😊

[@skimask5911]

Post it up for sale. I sold my refurbished master kit for 1k a month ago. I had it for about 3 years sitting in my garage.

[@DadbrosGarage]

I want one of these for my 454 big block Chevy

[@skimask5911]

No you don't especially if it has a mild or higher cam.

[@DadbrosGarage]

@@skimask5911 why not may I ask I've been thinking about it for a little while

[@skimask5911]

@@DadbrosGarage I've been to the classes holley offers for the efi training. And the instructors best explanation is "the system isn't capable of fueling/mapping a radical cam." I'm not saying it can't be done because I'm sure some tuners have figured it out but the instructor advised against it possibly to save the heartache? The self tuning program works to an extent if its properly set up but shouldn't be heavily relied on. Look up videos over the wizard tune feature.

[@KCadbyRacing]

Sorry this is long winded but below this first paragraph is my thought (opinion) on Stealth compared to Carb (with long duration/overlap cams) and I also explain my experience with Custom Building Tables. For those that don't know of them, (even though I've been tuning Holley EFI for years) I have learned LOT from these guys. "Joe Simpson" and "Devin Vanderhoof" IMO have by far the best, most in depth Holley EFI videos. Joe shows and explains a lot of in depth tuning, while Devin's channel is more about "Proper Wiring" and setting up MANY things in the Software. And JFYI, yes I said Software and Joe's "Watch this BEFORE You Buy a Holley EFI Snipper in 2023" explains why. AND, both of them are "entertaining" as well so check them out 👍 I'm not disagreeing with any instructors (that would be ignorant) but you can look at it this way. The Sniper's fuel placement is similar to carburetors and there's still tons of vehicles running carbs with giant cams (but in many cases they have the carb set to idle higher). With that said: I know it costs more but I do recommend going with the Terminator X if possible because Multiport Injection is for sure better. (injectors way closer to the valves). ...Edit... Another reason that Terminator is better (if needed) Load Sensing can be changed. (see "...Edit..." paragraph below)... But either way, this is one of my experiences with tuning an engine with aggressive cam. I do all of the (Term X) tuning on a friend's race-only LS swapped S-10 and sorry but I don't remember what size his cam is (I know it isn't mild)... The issues with long duration, overlap cams is "lack of, and erratic vacuum (MAP) at idle" which can lead to not getting all of the fuel into the ports at low RPM (which for obvious reasons is worse with TBI). The vacuum is erratic with cam/idle-lope and the lower vacuum makes it idle farther up on the Base Fuel Table = loss of resolution. But since I have always built Custom Tables (I stopped counting my Holley EFI tunes on Dragbikes years ago at 30+). It's easy to add resolution to the Fuel Table by replacing the higher vacuum (lower kPa numbers) with larger values that are closer to where your engine normally runs, plus you can increase the spread between the two kPa rows (right where it idles) so it only fluctuates up/down on those two rows (vs 3+ rows with closer/tighter kPa spread) = keeps both the Fuel Flow and Timing steady. And (I see your C-10 is Street) JFYI, if it's Drag Race only the loss of resolution doesn't really matter (but I always make the above changes anyway because I'm picky and have always built Custom Tables). ...Edit... Big mistake. I apologize for posting this paragraph before looking at Sniper V--2 Software. I see now that Load Sensing can't be changed, which makes this paragraph useless on this video but I'm going to leave it for anyone that might be curious what can be done with TermX, HP and Dominators... Two ways to get a better to best idle are (this one is for extreme cases and it's more complicated). Set the Load Sensing to "VE Combo" which adds a small "Alfa-N Idle Fuel" table for the idle (and just above idle) RPM. This doesn't change the main VE Based Fuel table but Alfa-N Idle Fuel is Lb/Hr Fuel (with TPS/RPM axes) = doesn't matter what MAP is doing at idle. Combo is more complicated because it requires having to figure out where the transition between the two fuel tables needs to be set (Max TPS% and RPM settings for the Alfa-N Idle table), along with having to make sure the Fuel Flow is the same (as close as possible) when/where it transitions form Alf-N Idle to the main VE Fuel table (for smooth low TPS% / RPM throttle response). Kevin's KSR Performance & Fabrication channel shows him deciding to switch to Combo on a Ferrari that has ITBs. The second, easier way to get a good/happy idle is by blocking off the Idle Air Control (which will constantly hunt if it isn't configured right, trying to keep the idle smooth) and having erratic vacuum doesn't help that. The biggest downsides to plugging the IAC are, you have to hold the idle up yourself on Cold Starts and you won't have IAC to make up for AC compressor load. Being honest, I didn't install this TermX and the shop that installed it DID blocked off his IAC (told me it drove him crazy trying to get it to idle right) and since they didn't tell the owner they did that, it drove ME crazy, wondering why none of my (first ever) IAC changes didn't do anything...lol... And lastly, this truck runs perfect everywhere but it does idle lower than I'd like on cold starts (doesn't stall though), so I've been wanting unblock and play with it IAC but the owner lives 1/2 day round trip and when we're at Gainesville racing I'm always helping at least three bikes (plus him if wanted/needed) = no time to play...

[@wheresmy10mm]

I can't find any information on the fuel pump and fuel filters. The sniper 2 out of the box is E85 compatible, but are the fuel filters and regulator E85 safe?

[@darensell2241]

E85 safe? lol

[@wheresmy10mm]

Some TBI systems use non PTFE sealing components or other reactive material that E85 will eat through faster than components specifically chosen to be used with E85. I returned this unit after I bought it, as it was nearly useless for my application and wants and wasn't technically E85 compatible anyway. ​@darensell2241

[@darensell2241]

@@wheresmy10mmwhy isn't the 2 compatible if the 1 was?

[@wheresmy10mm]

It took me nearly two weeks to get a straight answer out of them. Technically you can run e85 through the unit only but they won't warranty issues. ​The master fuel kit for efi conversionis not. You need specific filters, which holley does sell. You also need a different pump and different ptfe lines. @darensell2241

[@Mxaviair]

It all started so simple... and then it became a nightmare of endless options.

[@r1g2v3]

Is the cooling fan module a soft start? or instant on ?

[@HolleyPerformance]

Instant on

[@vincentmarino9825]

Is the Sniper 2 compatible with e85 fuel?

[@GbodyMedia]

Gotta love Holley

[@flyingace5057]

If I buy it now and get the smaller screen can I upgrade to the bigger one when it releases?

[@HolleyPerformance]

Yes you will be able to buy the 5-inch as an accessory.

[@flyingace5057]

@@HolleyPerformance How much will it cost?

[@BBD40]

does anyone have Sniper 2 on a Mercruiser / Bravo? I have twin 1990 454

[@cesarconh895]

Is there a 2 barrel option for my 1988 Nissan Pathfinder, and does it work with a hallafect distributor??

[@HolleyPerformance]

You can find 2-barrel options here - www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_1-_and_2-barrel_systems/

[@seandurgin]

Any plans to support the Fors E40D transmission?

[@andycarranza4125]

So nothing is compatible from sniper 1?

[@HolleyPerformance]

From the actual system itself, just the external sensors (coolant and Wideband)

[@HolleyPerformance]

The Sniper 2 Ecosystem features a new main harness that includes several refinements to ensure your EFI conversion is a hassle free and painless process, you will have to remove the existing Sniper 1 main harness if you are upgrading to a Sniper 2 system.

[@GbodyMedia]

Love it

[@jb91300e]

Does it support E85?

[@HolleyPerformance]

E85 support is not currently supported with Sniper 2

[@johannesschroff4097]

Are wires and ECU shielded now to protect against RFI? Are there capacitors or ferrite to protect?

[@HolleyPerformance]

Next generation ECU features improved RF noise and interference resistance.

[@HolleyPerformance]

The Next generation ECU features improved RF noise and interference resistance (stands up to old car wiring, noisy alternators, faulty plug wires)

[@billtodoroski1243]

Can you upgrade to the 5inch screen on the sniper/stealth series 1?

[@HolleyPerformance]

Absolutely. The 5 inch was originally designed for Sniper 1. Should have more available next week - www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/ignition_and_fuel_systems/digital_dashes/parts/553-200

[@sabbo68]

Will a dual quad application be released soon?

[@HolleyPerformance]

No sir

[@AdrenalineTheory]

Anyone know if you can run two of these like you could with the sniper 1?

[@HolleyPerformance]

You cannot run Sniper 2 as a dual quad currently

[@date6431]

Is there goin to be a sniper 2 2300 model ??

[@HolleyPerformance]

Not at the moment

[@eracingregal]

Can it handle 150 shot nos on 550hp engine?

[@joshuagarvey9362]

Nope it can’t.Nothing wrong with this 4150 I bought 30 years ago.AFR shows I am dead nuts on point with it.waste of money.Sniper 1 had so many issues.Do you need to keep up with the upgrades?.Sniper 1 will be obsolete soon.Were are you going to find parts?

[@ne04em]

any plans on releasing sniper 2 2x4?

[@HolleyPerformance]

Not currently. We would recommend something like a Terminator X Stealth System for that

[@kisoshi898]

Does it add horsepower

[@BBD40]

No, it’s not a miracle worker. BUT if your carb is ill tuned you might notice a difference

[@ZackMartin177]

Hot Damn! Let's go 177th Temporal Recon Unit!

[@ScottKirk-Notredcrew]

🔥🔥🔥

[@axialmillipede]

Can it do cruise control on DBW?

[@HolleyPerformance]

There isn't DBW

[@fbodyx2gbodyx151]

What updates do you offer for gen 1?

[@djverhulst]

cool !

[@breakupgoogle]

Just saw this on jareds channel. Sounds amazing

[@the-dullahan]

No one knows what you're talking about.

[@breakupgoogle]

@@the-dullahan Holley sponsored jared @TheQuestionableGarage to do a video about this new product.

[@chrisbarker2880]

Drive by wire would be nice

[@christiansilbernagel-v1k]

I WISH LUCK, I HAD THE ORGINAL SNIPER, I REMOVED IT AND WENT BACK CARB. HAD NOTHING BUT ISSUES. MONTHS OF TRIAL AND ERROR

[@jafopt]

Your sniper system is not field serviceable. For restomods, it is almost always out of warrantee by the time the system is up and running. You also do not provide parts diagrams. And the topper to it all is that I have to ship it to you, you give a 6 to 8 week turnaround time for diagnosis, and possible repair, that I may have to pay for. In the meantime, it’s leaking fuel, probably because of a bad O ring. If you bought a product stating its superiority and dealt with this poop show, would you ever trust the company?

[@paulhetherington3854]

My convert? My PA' owns HONDA(ARRVN!) You don't - have any intel - on EFI! No tax payer - has one!

[@batchmasterb2batchmasterb106]

Stay away.. you will throw away 500 dollars buying all of the other stuff to make this system actually work.. you cannot just order this for a carb replacement... you will end up with a paper weight unless you have 1500 dollars minimum to make this system a viable carb replacement.. do your research... they haven't

[@joeg.9536]

LMAO! 😂🤣

[@stevedriver1476]

What you buy today will be obsolete in 3 to 4 years. These things are primative,, complicated and unreliable as a daily driver