Hey guys I'm new to the forum and tried a search with no results. I just bought a 99' Z28 A4 with SLP lid and a Magnaflow catback. Its got 2.73's outback and was thinking about going with 3.73's. I have a buddy with a 98' Z28 6M and he's runnin 4.10's but I figure thats overkill for the A4 right? Thanks in advance for any help.

 

342s or 373s. whats your rpms at 60mph?

 

right now with the 2.73's 60mph is about 1500rpm

 

if u run the car in 3rd or d u will get a general idea of what the 373 would be like in od. 373 would be just a tad lower gears than 3rd with your 273s so the rpms would be just a little higher. if u feel its a bit much go with the 342s.

 

Thanks man I'll try that..BTW nice ride!