Bull-X Downpipe For Audi S4/S5 (B9)
Bull-X
Made in Germany, the Bull-X downpipe for Audi S4/S5 (B9) is the premier solution for your tuned 3.0T! Features include:
- Integrated thermal shielding, up to 300c ambient temperature reduction
- Decat solution for optimal power
- 100% plug and play for original downpipe
- CAD optimized flow analysis for the highest performance
This part requires proper ECU tuning to avoid a CEL, as well as to optimize performance.
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