Valvetronic Designs BMW G8X Flange Gasket

70mm Stainless Steel Downpipe Gasket • S58 Twin-Turbo Inline-6

OE Cross Reference: BMW 18308053348 (18 30 8 053 348)

A leak-free exhaust starts with a proper seal. The Valvetronic Designs 70mm Stainless Steel Flange Gasket is a direct-fit replacement for the downpipe flange connection on S58-powered BMW M models. Whether you're installing new downpipes, swapping exhaust components, or servicing your current setup, this gasket ensures a tight, reliable seal that holds up to high exhaust temperatures and boost.

Features

• Stainless Steel Construction: Built to withstand extreme heat and repeated heat cycles without breaking down.
• 70mm Diameter: Precision-sized for the downpipe flange on the S58 platform.
• Leak-Free Seal: Prevents exhaust leaks that can cause ticking noises, lost performance, and check engine lights.
• Direct Fit: Designed to work with Valvetronic Designs downpipes and exhaust systems as well as factory components.

Fitment

• BMW G80 M3 / G82 M4 / G83 M4 Convertible
• G87 M2
• BMW F97 X3M / F98 X4M

Tip: Always install a new gasket when removing or replacing exhaust components for the best seal.

📩 Questions or fitment confirmation? customerservice@valvetronic.com

Valvetronic Designs shipping & returns

• Returns: new, unused and uninstalled parts within 30 days of purchase, in the original packaging, with a return authorization (RMA) number issued first.
• Restocking fee: 25% on all non-warranty returns; the customer pays return shipping unless the part qualifies for warranty.
• Sound: exhaust sound and tone are personal taste and are not grounds for a return or warranty claim.
• Warranty: lifetime on stainless and titanium tubes and welds, 3 years on mufflers and resonators, 1 year on valves, remotes, electronics and tips. If a problem shows up after install, contact us before removing the part.

To start a return or ask a question, contact us with your order number.