S4 B5 2.7T 1999-2003

The ultimate chip upgrade for the S4 2.7T engine is available from APR. After months of long nights and many hours of dyno work we are pleased to offer you chip tuning that is second to none. We have worked hand in hand with many customers to deliver a chip that works. Expect huge increases in low-end torque, improved throttle response and a smoother, more powerful top end.


APR BiPipe Kit 2.7T

The APR BiPipe Kit eliminates any and all reliability issues of the 2.7T throttle body boot. This cast aluminum pieces features recirculation valve ports that are enlarged, which helps in reducing boost spikes during gearshifts and improves turbo response after the shift.


APR Intercooler Kit 2.7T

Improved cooling leads to smoother and a more consistent power delivery. The APR intercooler upgrade for the S4 is a combination of RS-4 intercoolers and APR designed and developed peripheral parts. The RS-4 intercoolers provide cooling superior to that of the stock S4 intercoolers. Besides being larger, they offer better build quality utilizing aluminum end tanks that are welded to the radiator cores. However, the highlight of the kit is the APR custom designed silicon hoses.


APR Stainless Steel Cat-Back Exhaust

APR has a stainless steel, mandrel bent, cat-back exhaust for the S4.