BMW F & G CHASSIS B58 4.5" CATTED DOWNPIPE

Upgrade your B58-powered BMW or Toyota Supra with our 4.5" High-Flow Catted Downpipe, designed for maximum performance without compromising drivability. Engineered with a premium high-flow catalytic converter, this downpipe significantly reduces backpressure, improving turbo efficiency, throttle response, and horsepower gains - while keeping exhaust emissions more manageable than a catless setup.

Constructed from 4.5” mandrel-bent stainless steel, it ensures optimal flow and durability under high-boost conditions. The TIG-welded finish provides long-lasting strength, while the included mounting bracket guarantees a precise OEM-style fit for easy installation.

With this upgrade, you’ll unlock a deeper, more aggressive exhaust tone, enhanced turbo spool, and a true motorsport-inspired driving experience - perfect for both street and track enthusiasts.

FITMENT:

• BMW F Chassis (B58 3.0L Turbo Engines)

• BMW G Chassis (B58 3.0L Turbo Engines)

• Toyota A90/A91 Supra (B58 3.0L Turbo Engine)

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