Manufactured from high-quality T304 stainless steel with hand-finished TIG welds, these Alpha Competition 3.5" / 90mm decat downpipes fit without modification between the turbochargers and the front exhaust pipes housing the gasoline particulate filters on the BMW M5 G90 and M5 Touring G99. Designed to remove the factory primary and secondary catalytic converters, they provide a power gain of approximately 55hp on a stage 1 tuned vehicle while delivering a more aggressive exhaust sound to the S68 engine. Offering one of the best quality, price and performance ratios on the market, these downpipes feature a high-flow design and stainless-steel thermal insulation, reducing radiant heat by up to 50%.

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Direct fit

Set of 2 downpipes

High-quality T304 stainless steel

3.5" / 90mm pipework

Stainless-steel thermal insulation

Measured gain on stage 1 tuned engine : 55hp

Aggressive exhaust sound

Hand-finished TIG welds

Installation hardware included

Lifetime warranty