~DonQPremiumTequila~

will an s4 catback fit on a a4 2.8

Mat Indukts Lambos

but there'll actually be a performance loss. NA engine won't perform as good with less back pressure.

Mike2kS4

Every N/A car I've owned has had tangible (Dyno, ET) increases from a freer-flowing exhaust and/or headers. Headers are the ultimate backpressure reducer, and really woke up my LS1 when combined with a cat-back.

QuiksilverS4

If I had a 2.8 I wouldn't want to lose any torque.

~DonQPremiumTequila~

Thanks that s all i needed to know

dscottjr

eh, who cares about a lil' lost torque -- if you had a 2.8 you'd lose to everything anyway

Mike2kS4

But the OE S4 exhaust is quite conservative in pipe diameter and sound insulation method. I think if it physically fits it'd be an excellent, economical upgrade.

If I had a 2.8 I'd do it (even more so considering I have an entire turbo-back exhaust from my S4 in my garage.)