How to Install a 4" Diamond Eye Exhaust | 1st Gen Cummins

[@decentgarage]

You may have noticed a slight modification to the channel name. This is a change that should help the channel accommodate further growth into planned future projects. Let me know what you think!

[@eulaliolopezjr]

Love the new channel name it opens up to the possibility of other projects other than first gens. O and i think it looks better with the 6" tip.

[@decentgarage]

Thanks! Yeah I thought it looked too big at first but it has really grown in me. Thanks for the feedback about the channel name too

[@diegophilip4101]

I know im randomly asking but does anyone know a method to get back into an instagram account..? I somehow forgot the login password. I love any assistance you can offer me!

[@bodietitan557]

@Diego Philip Instablaster =)

[@diegophilip4101]

@Bodie Titan i really appreciate your reply. I got to the site on google and Im waiting for the hacking stuff now. Seems to take quite some time so I will get back to you later when my account password hopefully is recovered.

[@rgdegregori8744]

I had a 93 D250 4X4 5 speed, extended cab for 20 years. It went to Baja camping many times, Colorado,, Wyoming, Montana, Idaho, Oregon and everywhere south west. Put 200k on it with many modification that I see you doing. The weakness in those trucks was the open channel frame. Off-roading takes a toll on that frame which was really designed for the light weight low torque V8 gas’s engines. Another complaint is the drum brake rear axle. The axles have to be removed to service the brakes. I had the original front rotors were on the truck when I sold it to my son’s friend. It’s still going strong, I bought a extremely low mileage 2012 with the 6 speed. Another great truck and comfortable as I accumulate years. Trouble is there is not as much that I can do on it other than routine maintenance. I miss the 93 still. Keep up the great videos. RD

[@Valve-sb7ne]

Wow, that exhaust system looks easy to put on. I may have to order one for my first gen!

[@decentgarage]

It is a nice upgrade. Glad to finally have done it!

[@TheScott240]

Once again, another great video. I also have the HX35 on my 93 D250 with a 5 speed. And I agree with you on the noise, I was gonna straight pipe my truck but the 12hr drive to get it home from my dad's was a long loud drive. And that was with the stock exhaust cruising at 70mph, so the top end of the RPM, and it was loud. So I will also be doing a muffler when I upgrade my exhaust in the future. And once again I will be using your discount like I did on the Hungry diesel fuel pin and 3200 governor spring kit.

[@decentgarage]

Yeah I love this new exhaust. Still sounds really good but the cab is so quiet.

[@rodneythornburg818]

Nice job, several people beat me to the band clamp. I done a 2nd gen and had exhaust leaks start popping up and the band clamps fixed them. I also couldn't get my exhaust tip to stay in place, so I cut the nut and bolt off and band clamped it also. The larger exhaust tips normally will give you deeper sound and a little louder. I have always liked a deep sounding exhaust over a high pitch sound.

[@decentgarage]

I will definitely be upgrading the clamps.

[@TheScott240]

Well here I am watching this video again. My stock exhaust is all cut of and in a pile. My new exhaust is out for delivery and once again I used your code and saved over $40. Now just waiting for the UPS truck to show up

[@decentgarage]

Nice! Glad the discount helped

[@ljkck3578]

The only thing I did different was to use stainless band clamps instead of the ones they sent with. That and my muffler has 2 hangers on a regular cab. I don't know if it was factory or not but they were there.

[@decentgarage]

I may move a clamp up to the muffler so there are two there and I will look for stainless clamps. I didn't even realize the clamps they sent weren't stainless

[@ljkck3578]

@@decentgarage Here is what I used: www.amazon.com/Joint-Exhaust-Clamp-Preformed-Stainless/dp/B075DWV37D/ref=asc_df_B075DWV37D/?tag=hyprod-20&linkCode=df0&hvadid=241914879076&hvpos=&hvnetw=g&hvrand=15659015243981521101&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9020983&hvtargid=pla-594197032554&psc=1

[@decentgarage]

I was just hopping back on to ask you for a link to what you used! Thanks! 👍

[@diamondeyemfg]

Hey! great vid! It's thorough and detailed.

[@decentgarage]

Thanks! I should have reached out to you to sponsor it! 😂

[@diamondeyemfg]

@@decentgarage well we can at least share it now!

[@decentgarage]

@@diamondeyemfg No problem! Share it to the world! 😂

[@trevorlee2484]

Now Banks needs to make his diff cover for a Dana 70! Your truck is really coming together.

[@decentgarage]

Haha! I wish they made one!

[@salstonightsbiggestloser]

@ 2:15, that is a rattle from hell in my truck. Going to relocate a hanger for the downpipe. Tried to shim and add new rubber with no luck.

[@decentgarage]

Yep I know what you're talking about. I will do a video in a few weeks on how to fix it. Just waiting to pull the exhaust when I install my kelderman.

[@salstonightsbiggestloser]

@@decentgarage Copy that. I'm working on a 90 non-IC at the moment. Just got done with duck foot, respraying the engine, dowel pin etc... HX35W and 3piece manifold got installed the other day and will be wrapping up to fuel pump improvements soon. It's 3 speed A727 trans.

[@decentgarage]

Nice!

[@ronsre-creations5289]

Another nice upgrade ! I have a suggestion. The bracket at the bell housing from the old system. I believe is a good idea to take off and mod it to fit the 4". The fact that the factory put it there was due to the engine vibration and cracking of the pipe at the flange. If you remember the bracket had an isolator rubber bushing in it for noise that was probably toasted. But I think it would be a good idea to reinstall it. 1. the exhaust is bigger and heavier than the old system. Just sayin. "Food for thought". The bean counters at the factory wouldn't spend a plug nickle more than they had to when building these trucks new. It was there to avoid warranty issues. Guess I have to get one now. Now that you showed how easy it was :)

[@decentgarage]

I will look in to adding a support back in there. Thanks for the tip!

[@ram_diesel_power6039]

So they now sell a ss exhaust for the first st gens. 7 or 8 years ago I took my stacks off and put the diamond eye aluminized 4 inch exhaust on. Now it’s all rotted out. Tail pipe rotted off two years ago and now the down pipe has a hole in it. Hope the ss one is better. Good video.

[@decentgarage]

Yeah I went with ss to hopefully avoid any rusting issues.

[@andreweverett6925]

1.Did you lose any ground clearance? 2. Lose any clearance on, transfer case, axles, bell housing? 3. Can you still put a mount to the bell housing? 4. Thanks

[@decentgarage]

1. No 2. It's tight around the tcase but fits 3. No but you could weld a bracket on and make the work still

[@bbtoyshop]

I see you have a crew cab did you have to get a extension to the exhaust to fit the longer wheel base I know Eric is very knowledgeble when it comes to the 1st gens

[@decentgarage]

I didn't have to get an extension. The kit is sold for an ext cab long bed. Mine being a crew cab short bed has the exact same wheel base as the ext cab long bed so it fit perfect 👍

[@algorithmscollide8489]

Which v band size did you use?

[@decentgarage]

This has an hx35 so a 3.5 inch band

[@jbmartens9024]

We’re did you get the exhaust

[@decentgarage]

The hungry diesel 👍

[@kadenkinjerski2192]

How much was the kit ?

[@decentgarage]

I don't remember exactly but right around 300. I got the more expensive stainless steel kit too.

[@HoosierDynamics]

Do you think the tips change the exhaust tone any?

[@ronsre-creations5289]

I sold cars for 25 years and had tons of exhaust done. If it has a rolled lip it will be a different sound from a slashed tip to a straight cut. All tips give a slightly diff sound. ;)

[@decentgarage]

Exhaust sound is highly dependent on the size pipe of the exhaust and then the tip actually plays a huge role in the sounds. Not just the size of the tip but whether it is rolled or straight.

[@DAKOTANSHELBY]

I understand my comment is about a year after your video, but I found your channel and love all things 1st gen Cummins. My concern is that Diamond shipped you a nice stainless steel system, but with the same junk mild carbon U-clamps and nuts that will rust out in no time. Additionally, they did not provide you a heat shield for the down pipe or instructions to swap the old heat shield and secure with hose clamps. Your HVAC box will get too hot and melt without the heat shield in place. Back to the U- bolt clamps, they look bad and distorts the piping. They should have sent you stainless steel band clamps. I'll ask you to update us in a future video of how those U-bolt clamps look after a winter season of use. I'm looking to update my 3rd gen Cummins Mega Cab from the current 4 inch stainless steel system to 5 inch stainless steel, including all stainless band clamps, hangers and fasteners. Keep the videos coming! Loo

[@decentgarage]

Thanks for the comment man! Yeah I'm not a huge fan of the u clamps they sent but they have worked fine. I've been meaning to switch them out to band clamps but just haven't gotten around to it. There has been no rusting issues with these u clamps though. I've taken the exhaust completely out and back in 3 times in the past 3 months. Everything comes off nicely. Also I've had no issues with the down pipe and heater box.

[@jakeeverich9223]

Rig is coming along great! Like others have said, it’s a good idea to switch to stainless band exhaust clamps... the supplied guillotine clamps are junk, and you’ll find that they’ll create gaps in the sealing joints. Also - as another comment referenced, it’s a good idea to come up with some sort of support where the transmission isolator / downpipe was. It was there for a reason. Otherwise, that’s a significant amount of weight and vibration on your turbo / manifold. I even went the extra mile and added a couple more isolator clamps to the system, got rid of the nuisance vibrations.

[@decentgarage]

Do you mind posting a link here to the clamps you used?

[@jakeeverich9223]

decent_garage Here ya go: www.napaonline.com/en/p/BK_7333224?cid=paidsearch_shopping_dcoe_google&gclid=Cj0KCQjw0Mb3BRCaARIsAPSNGpWokyb_zxVyrA_O0KipC1oQL3in11cmo_yDFhbweMCD1Rla-aST1nYaAlaeEALw_wcB Also - added three of these universal hangers; one of them was coming off the trans hanger bolt to the downpipe. Helped a lot. I had a constant vibration between the T-case and thee exhaust before I added them. www.napaonline.com/en/p/EXT35103?cid=paidsearch_shopping_dcoe_google&gclid=Cj0KCQjw0Mb3BRCaARIsAPSNGpWhBPaqUGKtCtLF9lNxgwYVHfdbAgzKsOVFl6w1jPwLo-aUAEeyNLEaAii_EALw_wcB sent you an email too a while back about rebuilding my VE Pump, not sure if you got it? It’s not as hard as it sounds.. send me a message if you ever need some tips and tricks! I’m running an HX35 also, scored it for free and I rebuilt it. Excellent mod!

[@nbanegro1276]

Is this the hx40 down pipe?

[@decentgarage]

I believe so

[@jonathanlloyd2371]

I have a 92 d250 bought from Nevada so no rust, original exhaust in great shape but think i will get the 4" with straight muffler to get some deeper exhaust note. I want to know from you or others, my stock exhaust, where it routes over top of rear axle, is smashed from top side, so exhaust is only about 2/3 of the 3" diamater. Truck is in great shape so i couldn't imagine how this happened. Did they come like this from factory? Anyone know?

[@decentgarage]

That's a good question. I think mine was smashed slightly at the bend too but I don't recall exactly.

[@duanehenicke6602]

Yep. Every single one of them came smashed from the factory.

[@systemfile]

I’ve never had luck with those cheep clamps that come with exhaust kits. I always end up buying the extra wide band clamps.

[@redlined9192]

Did you por15 the bottom of you're truck?

[@decentgarage]

I used chassis saver. Similar to por 15

[@redlined9192]

@@decentgarage how has it held up? And how did you prepare before the paint?

[@decentgarage]

It has held up great. If you go to my playlist of painting the silver crew cab I have a whole video on it.

[@duanehenicke6602]

Did you notice significant difference going from 3" to 4"?

[@decentgarage]

Yes, slightly more power, The sounds is more full and egt's dropped slightly.

[@duanehenicke6602]

@@decentgarage Thanks. I've been trying to justify the purchase. Didn't know if the 3" outlet on the turbo would see a boost in power going to the 4" pipe. Figured as much on the egt's. I'm running 3" coming out in front of the rear tire. Shorter distance and fewer bends to slow it down. So that's one thing that's kept me from stepping up to this setup.

[@decentgarage]

@@duanehenicke6602 i ran 3" for years and it did just fine. If money is an issue just stick with the 3"

[@duanehenicke6602]

@@decentgarage I have a early 91. Brother bought it in 97, in Lubbock TX the day after he graduated from Texas Tech. 98k on odometer. 3rd owner. Drove it about a yr. Did nothing more than a set of tires and wheel bearings. Started a family and couldn't afford to keep it. Sold it to dad in 98. He drove it until 2010. Sold it to me for 1k when he retired from farming, and i took over the operation. Now my father did nothing more than the bare minimum to keep it rolling from point A to B. Needless to say it needed a lot of money thrown at it. Current day. The a/c has been rebuilt numerous times from top to bottom. Along with everything that surrounds the engine. I replaced the tiny radiator with aftermarket aluminum 3 core. Installing a aftermarket intercooler at the same time. As it came from the factory without one. Injector pump has been rebuilt. Factory turbo. New injectors. It ran better when the leaking and much wore Injector pump was rebuilt. But last couple years it just didn't have much power. Was recently offered a BD fuel pin and 3200 governor spring. I figured what could it hurt? Holy shit it's alive!!! Don't know how fast a scalded ass Ap can run, but i 'm pretty sure i could beat him.... 3.54's with 5 speed getrag. 33-12.50's. I can run with traffic in 4th. Even 5th at low rpm's just goes. Wish i had done this years ago!🏃😍

[@nicholascravens6674]

Why not run without a muffler?

[@decentgarage]

I actually prefer the slightly quieter sound.

[@nicholascravens6674]

@@decentgarage im from Kentucky-- aint no body got time for quiet lol

[@alexbailey1085]

Just take out the resonator muffler, and just put up all night with somebody better