1/4???
Thread Starter
Registered User
Joined: Sep 2007
Posts: 28
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From: Co.Co.County
1/4??? I have a 1999 Trans am LS1 A4. Just wondering what I might be looking at for 1/4 numbers and speed.
~SLP lid
~Smooth bellow
~K&N filter
~EGR mod
~TB bypass
~TB bump stop
~Free ram air on the filter box and plastic cover below
~SLP lid
~Smooth bellow
~K&N filter
~EGR mod
~TB bypass
~TB bump stop
~Free ram air on the filter box and plastic cover below
Thread Starter
Registered User
Joined: Sep 2007
Posts: 28
Likes: 0
From: Co.Co.County
2.73's are stock in a A4 aren't they? Whats a good catback to get thats not to expensive. I don't need anything crazy I'm just going to drive this car and track it a few times.
you could have 2.73's or 3.23's. I dont know the codes but you can look them up real quick and get it off your driver door build sticker. expect anywhere from 13.5 to 13.9. If you get below 13.5's you'll be doin good.
Edit: and for a catback you really cant beat the SLP LM's for the money. All stainless and very free flowing. I have a LM2 and its not obnoxious at all. especially with stock mani's.
Edit: and for a catback you really cant beat the SLP LM's for the money. All stainless and very free flowing. I have a LM2 and its not obnoxious at all. especially with stock mani's.
If you're going to keep your stock exhaust mani's for a while go with the loudmouth...it sounds great with stock mani's/cats. Won't hurt the pocket book either. Or you can look into Hooker, they're cheap and sound good. I'd bet you'll run in between 13.5 and 13.7, maybe a little lower if you have 3.23s.
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Verdad Gallardo I think you can look on your door jam at the options your car came with...I believe the 3.23 option is GU5 ...if it has that then you have them. Someone correct me if I'm wrong though. You should get a cutout too, cheap and definitely worth it.
It bypasses the muffler, you can uncap it and run open exhaust at the track and it will give you a little more power when you have it open. The manual ones can be had for like 30 bucks. If you're not sure what I'm talking about then take a look at some of the vendors exhaust accessories sections on their websites.
I would say 13.3-14.0 depending on weather, driver, and traction.
Here is a good read for you: https://ls1tech.com/forums/generation-iii-external-engine/520845-mod-guide-induction-exhaust-please-read-before-posting.html
Here is a good read for you: https://ls1tech.com/forums/generation-iii-external-engine/520845-mod-guide-induction-exhaust-please-read-before-posting.html
Originally Posted by 95 Z28
. You should get a cutout too, cheap and definitely worth it.
and yes 2.73 to 3.23 were optional gear sets for the A4. wether it was justa production line car or ordered( i beleive all B4C A4 cars were 3.23 never seen a 2.73 one yet)