Description
Bmw B58 Exhaust 5IN Catted Or Catless G20 / G29 Downpipe is an application-led listing for buyers comparing this downpipe. The known vehicle context is BMW B58 Exhaust 5in Catted or Catless G20 / G29; confirm the exact model year, trim and body style before ordering.
This listing is part of our Exhaust Systems & Tips catalog.
Product overview
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:
BMW G30 G20 G22 G32 B58 M240i M340i M440i 540i 640i 3.0T
B58 Exhaust 5in DownPipe Catted or Catless – BMW G20 / G29 M340i/ A90 Supra & More specifications
| Product | B58 Exhaust 5in DownPipe Catted or Catless – BMW G20 / G29 M340i/ A90 Supra & More |
|---|---|
| Vehicle application | BMW B58 Exhaust 5in Catted or Catless G20 / G29 |
| Part type | Downpipe |
| Material | Confirm available construction with our product team |
| Finish options | Confirm available finish options |
| SKU | b58-exhaust-5in-downpipe-catted-or-catle-351031805 |
Fitment and buying notes for this downpipe
- Confirm inlet diameter, outlet shape, side, quantity and available clearance.
- Check compatibility with the factory or modified exhaust configuration.
- Heat, alignment and secure clamping should be reviewed by a qualified installer.
Product photos and titles are useful references, but they do not replace a fitment check. Send the make, model, model year, trim or chassis code, clear vehicle photos, required quantity and destination country before ordering.
Installation and order preparation
Mounting methods can vary by vehicle and product version. Do not assume a direct bolt-on installation unless it is confirmed for your exact application. Test fitting and professional installation are recommended, especially for structural, safety-related, electrical or large exterior parts.
For a faster quotation, specify the product SKU b58-exhaust-5in-downpipe-catted-or-catle-351031805, the exact vehicle application, preferred material or finish, quantity and delivery location.
Frequently asked questions
How do I confirm whether this downpipe fits?
Share the exact vehicle year, trim, body style and any relevant chassis, engine or factory-option details. Our team can compare that information with the listing before quotation.
Can I choose a different finish or specification?
Available options depend on the part, construction and order quantity. Include the preferred weave, gloss or matte finish, color and any reference photos in your inquiry.
What should a wholesale inquiry include?
Include your company name, target quantity, destination country, required timeline and whether you need samples, repeat supply or custom packaging.
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