For Audi B6 B7 S4 4.2 V8 Avant Quattro Replacement Piggy Pipes

APPLICATION:

For Audi S4 B6 4.2 V8 (04 - 05) 

For Audi S4 B7 4.2 V8 (05.5 - 08)

FEATURES:

These Include 200 cell high flow cats, and no pre-cats, so you can still pass inspection

Piggy Pipes are the Best Sounding, Free Flowing

One of the Best, and Certainly Most Cost-Effective, ways to add Power to your B6/B7 Audi S4 with the 4.2 V8 is the Pipes

The Factory System Contains two sets of catalytic converters on each downpipe,

The Pre-cat in Particular Robs the Engine of Power Because It is very Close to the Engine and Creates Turbulance/Disruption very Early in the Exhaust Flow out of the Engine.

(1) Pre-cat and (1) Main cat.