Milltek Sport Audi RS4 B7 (2006-2008) Sports Cats 200CPSI

Milltek Sport's Sports Cats for the Audi RS4 (B7), 2006-2008, replace the restrictive factory catalytic converters with genuinely higher cell-count metal substrate units, delivering improved flow while retaining meaningful emissions control, unlike a full de-cat pipe. This version uses a 200 cells-per-square-inch substrate, a genuine step up in flow capacity over the factory ceramic units this generation of RS4 was fitted with from new.

Constructed from T-304 stainless steel throughout, these sports cats are built to outlast the factory components they replace, resisting the corrosion that eventually catches up with mild steel factory parts. Reducing restriction at the catalytic converter stage is one of the more meaningful upgrades available on this naturally-aspirated V8 platform, letting the engine breathe more freely without stepping into full de-cat territory.

Why Choose These Sports Cats

• 200 cells-per-square-inch substrate, genuinely higher flow capacity than the factory units
• Retains meaningful catalytic converter function, unlike a full de-cat pipe
• T-304 stainless steel construction, built for long-term durability
• A meaningful upgrade for this naturally-aspirated V8 without sacrificing emissions compliance

Compatibility

• Audi RS4 (B7), 2006-2008