Rvng 4.5'' Stainless Steel Midpipe for G80 M3 & G82 M4

Rvng SS304 Stainless Steel Dual to Single Midpipe — 4.5” Edition

INSTALL GUIDE: https://youtube.com/shorts/RJAP2U4y9cM?si=s0ZE-3YfhISRTALF

For your 2020–2025 BMW G80 M3, G82 M4 & G83 M4 (S58 Engine)

INCLUDES EXTENDED BRACE

4.5” Midpipes will ship out towards the end of November/first week of December which is when we will be restocking. We are allowing it to be sold even when out of stock so customers are able to take advantage of the Black Friday deal.   

We’re proud to introduce the Rvng 4.5” Stainless Steel Single Midpipe — the largest and most aggressively engineered midpipe solution for the S58 platform. Unlike the typical 3.5” midpipes that every other company is offering, our 4.5” design delivers a massive 65% increase in flow area, unlocking performance gains you can truly feel.

This upgrade isn’t just about size — it’s about making the most of your S58’s potential. By removing the restrictive OEM midpipe and going beyond the industry-standard 3.5” setup, we’ve reduced backpressure to a minimum, resulting in faster turbo spool, sharper throttle response, and a raw, aggressive exhaust tone that sounds just as powerful as it feels.

Why 4.5” Matters:

We all know an Inch can go a long way. So while most companies settle at 3.5” and sell it as the standard — Rvng chose to offer a better product at a competitive price. When you realize you’re spending premium dollars, don’t you want the best? Our 4.5” system offers 65% more flow area, and when airflow improves, horsepower follows. Choosing Rvng means you’re not settling — you’re demanding more.

Key Benefits:

• +20HP / +32 TQ to the wheels
• 65% larger flow capacity over standard 3.5” pipes
• Faster turbo spool, improved throttle response
• Deeper, more aggressive exhaust tone
• ~17 lb weight reduction compared to OEM
• Direct bolt-on fit for G80 M3, G82/G83 M4 (cutting required)
• Fully compatible with OEM and aftermarket downpipes
• MPE compatible

Build Highlights:

• Mandrel-bent, TIG-welded 4.5” 304 stainless steel
• CAD/CAM flange design for smooth transition
• Optimized radius bends for maximum flow
• Lifetime warranty on fitment and craftsmanship
• Fits both LHD and RHD models

IF YOUR CAR IS LOWERED YOU MAY HAVE ISSUES WITH SCRAPING OVER SPEED BUMPS. SMALL AND OCCASIONALLY LARGE SCRAPES WILL CAUSE NO HARM TO THE ACTUAL PRODUCT. 

Vehicle Fitment:

2020–2025 BMW G80 M3

2020–2025 BMW G82 M4

2020–2025 BMW G83 M4 Convertible