im goin k04 on my car jw if its absolutley nessasary to go 3in or in a borla 2.25 is good enough

2.5 is prolly th biggest you want, 3 inch for pretty much bt only, small turbo with a 3inch will hinder performance (little to no back pressure), small exhaust with a large turbo too much backpressure, not good.

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99.5 1.8TQM Sport: APR Chip, Samco TIP, Forge Hybrid DV/BOV, EvoMS CAI, NGK Plugs, PIAA Highs/Lows/Fogs, SB Stg.3 clutch/steel FW, AWE DTS, Pauter Rods, APR Snub, RS4 Mounts....Be Lazy....Drive a Sleeper....

Downpipes will make the biggest difference, so make sure you get a new one. 2.5" TB is good.

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A4 1.8 CuTie
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