IRL D4 S8 Valved Catback Exhaust
IRL D4 S8 Valved Catback Exhaust - Stainless is backordered and will ship as soon as it is back in stock.
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S8 D4 systems are made to order 2-3 week production time.
Our high-performance Catback replaces the restrictive and heavy OEM system for improved flow increased power and sound without sacrificing drivability.
Expect more aggressive tone from your S8. The IRL catback has no more restrictions and now you can expect to see an increase in 27 whp and 37 ft/lbs of tq.
- Fits all Audi D4 S8 (2010-2017)
- Adds 27 whp and 37 ft/lbs of tq
- Improved sound & performance
- Constructed from T304 SS
- Bolt-on installation, no cutting or welding required
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Shipping Notice

Some oversized, heavy, or specialty items may incur additional shipping charges based on your delivery location. If this applies to your order, our team will contact you after checkout with the updated cost. Orders will not ship until additional charges are confirmed and paid.
