Valved Side Muffler Bypass 991.1 / 991.2 GT3 / RS - Brombacher Edition
Valved Side Muffler Bypass 991.1 / 991.2 GT3 / RS - Brombacher Edition

Valved Side Muffler Bypass 991.1 / 991.2 GT3 / RS - Brombacher Edition

Part #: BES 991 090 60SK
Delivery Time: Expected 6 DaysExpected in 2-3 weeks

$ 1,695.00
without Shipping


This bypass increases exhaust flow, sound and performance while reducing weight. M&M Exhaust GmbH only manufacture with highest quality T316 Stainless and Pierburg Exhaust Valves for added longevity over competitors' products.

- 2 1/2" (63.5mm) tubing.
- 35 + lbs. Savings - Weighs Only 8.3 lbs. (3,7 Kg).
- Made of T 316 motorsport grade stainless steel for improved durability over T 304.
- Fits 991.1 and 991.2 GT3 & GT3 RS models.
- Connects to factory headers and center muffler.
- Does not include O2 sensor bungs like competitors products, so laminar flow is retained.
- Reuses factory exhaust rings and clamps.
- Made in Germany by M&M Exhaust, GmbH.
- Factory like sound with valves closed – Aggressive Cup like sound with valves open.
- ECU software is NOT necessary.
- Does not alter emissions, 50 state legal in the U.S.

Our entire “Brombacher” line of exhausts is manufactured by M&M Exhaust, GmbH in Germany. They manufacture a multitude of Porsche Motorsport and Racing Exhausts. Each system is tested comprehensively for flow characteristics / rate, thermal stress, cracking, and longevity. If you are looking for the purest GT3 motorsport sound and an exhaust product that can handle abuse at the track, look no further.

Package Information

Size: 12.6 x 11.81 x 7.48 inches
Product weight incl. Packing: 8.16 pounds
FID: BES.991.090.60SK


991.1 GT3 (13-17)991 GT3, 3.8L, 350kW (13-)
991 GT3 RS, 4.0L, 368kW (15-)
991.2 GT3 (18-) 991-2 GT3 4,0L 368KW (18-)
991-2 GT3 RS 4,0L 383KW (18-)
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