2017 B9 A4 HFC and Downpipe

[@Audi_All_Day]

The trick with the b9 a4 is removing the rear mufflers and keeping all resonators

[@clutchplays3109]

How so? Because i just got a b9 a4 and im wanting to get a little sound out of the exhaust but im not sure what to do

[@gabrielg1749]

@@clutchplays3109Did you ever do anything? I’ve been looking to do the muffler delete but i cant find out a good way to do it. i would need to bend pipe but no muffler shop will do any type of muffler delete in NY state.

[@Gearsandco]

I absolutely agree, removing any res will make it sounds like your farting in a PVC pipe.

[@dominasindrusaitis3225]

Dude I love it. I have a same car except both resonators off and mufflers and it pops so I can’t wait to hear it when it’s fully done

[@octane_media]

Me neither man I absolutely love the car so far it’s only got 40,000 miles on it so hopefully it’ll last us a while !

[@dontriskett8098]

Nice video. Just did the same to my B9 A4. First impressions is that there’s an obnoxious rattle around 3-4k rpm. I have the same issue where the flex pipe is too close to the heat shield. That’s what I suspect is causing the rattle. Definitely a PITA to install.

[@octane_media]

I don’t have it around 3-4 for me it’s just right above idle and it actually ended up being my exhaust hanger bolts. I definitely wouldn’t do it again if I didn’t plan on the IE stage 2 Tune

[@dontriskett8098]

@@octane_media You don’t get a loud drone/rattle on throttle at 3k? Mine rear resonator makes a rattle. I double checked all connections, nothing is loose or rubbing. I might do the ecs rear resonator delete.

[@octane_media]

@@dontriskett8098 yeah I haven’t gotten that rattle atleast that I noticed I’ll pay more attention over the weekend and double check one thing over heard of is people rubbing on that crossmember / trans tunnel brace interfering with the exhaust with after market setups

[@Gearsandco]

I'm planing to do a muffler delete and also run catless but keep all the resonators so won't make the car sound raspy, Still planing on it. I might change my mind, there is literally no video that has Muffler delete and cattle's downpipe, so I would have the discover it my self. I had a Bow F30 328i and did a muffler delete with a hatless downpipes and sounded amazing, though I'm discovering that those VW/Audi 2.0T engines don't sound as good.

[@octane_media]

This was high flow cat, with a muffler delete and high flow cat it didn’t sound great at all in my opinion

[@QuanTatumRow]

Omg detrimental what you did to that poor hood latch

[@_Mario_PL_]

All you have to do is press it in and it comes off.

[@loganfahrner7470]

How did you get the bottom bolt, closest to the firewall on the passenger side off, I tried with a wrench and I can’t get enough room. Do you have to go from underneath?

[@octane_media]

I believe that’s the only one I had to go underneath for the top two I did with a wrench or a deep well socket on top of the motor it wasn’t fun climbing up there

[@houdavn]

This is going to sound silly, but I took my car to get my AWE Touring exhaust installed, and the guy nonchalantly planked on my engine bay and took it off in less than 5 minutes. He said he's done a few this way, and was not a stranger to awkwardly placed bolts. Try it this way if you don't have the extensions or wobble sockets to do it.

[@octane_media]

@@houdavn that’s what I ended up having to do to get the ones for the down pipe off that probably wouldn’t have been a bad idea for the bottom bolts of the catalytic converter

[@vincent1234321]

go for a stage 2 tune, I got IE stage2 my own. and 034 high flow cat

[@octane_media]

I’ve got the high flow cat and I’m going to be getting the tune here soon

[@mohammedkhan-io7po]

I have a b9 a4 currently got both resonators off sounds pretty good, wondering if I should get a high flow cat, what would the noticeable differences be? Also what brands would you recommend

[@mohammedkhan-io7po]

Also is a stage 1 tune enough to prevent engine light my Audi is FWD 190ps

[@octane_media]

I used ECS for my high flow cat , but personally I’d get the Integrated engineering one. My cat made it sound tinee not just louder

[@mohammedkhan-io7po]

@@octane_media I have a fwd b9 190bhp would I need a remap for the intake ?

[@mohammedkhan-io7po]

Sorry meant the high flow cat?

[@octane_media]

@@mohammedkhan-io7po you would otherwise you’d get a check engine light

[@-matt]

which brand hi flow cat did you get?

[@octane_media]

It’s a CTS Downpipe and high flow cat I got from ECS tunings website!

[@slow_a4859]

Are you able to drive like that without a tune

[@octane_media]

I have been with zero issues I haven’t noticed any difference in drivability and I have put almost 2,000 miles on it since the install. A tune is soon to come as soon as I get an intercooler for it!

[@slow_a4859]

@@octane_media Oh okay, you should go with IE stage 1 it’s incredible I ran a 0-60 in 4.35 and reduced my 1/8th time by 1 sec. I got 8.313 @ 84mph and my previous without time was 9.334 @ 76mph

[@octane_media]

@@slow_a4859 that’s awesome I’m planing on going stage two that’s why I’m waiting for an intercooler the stage 2 tune is optimized for the high flow cat and Downpipe.

[@MaoProductionsbyDP]

Does it throw a CEL?

[@octane_media]

Yes it did indeed throw a check engine light

[@camdenharrison6792]

cant seem to get the 2 bottom bolts off (the bolt underneath and the bolt closest to the engine) did you use a 15mm deep socket and did you go from underneath or from the top

[@bdez1259]

You can do 3 bolts on top with a ratcheting 15mm wrench, the bottom bolt you approach from the bottom, using a 15mm deep socket, with multiple extensions till you find the sweet spot. Penetrating oil sure helps.