描述
Maximize your B58 engine’s performance potential with this 5” high-flow exhaust downpipe, available in both Catted and Catless options. Engineered for enthusiasts who demand serious gains in power, throttle response, and exhaust sound, this downpipe is the perfect first step toward unlocking your turbocharged inline-6’s true potential.
🔧 Product Features:
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Massive 5” Diameter Inlet
Oversized 5-inch turbo inlet for reduced restriction, smoother flow, and increased turbo efficiency—ideal for both stock and upgraded turbos. -
Available in Two Options:
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Catless Version – Maximum performance, aggressive sound, and rapid turbo spool. Designed for off-road/track use only.
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Catted Version – Integrated 200-cell high-flow sport catalytic converter offers performance with emissions-conscious street driving.
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Dyno-Proven Power Gains
Up to +25–40hp and improved torque across the powerband, especially when paired with tuning. -
Premium Construction
Built from T304 stainless steel with TIG-welded joints for ultimate durability under extreme heat and pressure. -
Improved Turbo Spool & Throttle Response
Significantly reduces backpressure to allow the turbo to spool faster and pull harder. -
Direct Bolt-On Installation
OEM-style flanges, brackets, and O2 sensor ports ensure seamless fitment—no cutting or modifications needed.
📦 Compatible Vehicles (B58 Gen 1 & Gen 2):
BMW:
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G20 M340i / M340i xDrive (2019+)
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G29 Z4 M40i (2019+)
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G30 540i / X3 M40i / X4 M40i (with B58)
Toyota:
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GR Supra A90 / A91 3.0L (2020+)
Other B58-powered models upon request.
⚠️ Important Notes:
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Catless downpipes may trigger a check engine light (CEL); recommended to pair with a tune or O2 spacer.
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Catted downpipes are more emissions-compliant and help reduce odor/smell.
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Designed for enthusiasts—professional tuning recommended for full performance benefits.
🔥 Upgrade your B58 platform with this 5” Performance Downpipe and unleash deeper tone, more turbo sound, and noticeable power gains. Perfect for daily driving, spirited canyon runs, or full-blown track builds.
Fitment:












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