Fabspeed Rennsport Muffler. Porsche 991 GT3 / GT3 RS 2014-2016

Fabspeed Rennsport Muffler. 

The ULTIMATE OEM style high performance replacement muffler for your GT3

FEATURES:
•   Fits all Porsche 991 GT3 / GT3 RS vehicles 2014-2016 worldwide
•   Constructed from CNC cut T304L stainless steel
•   Designed from 3D scans of the OEM muffler so we can achieve perfect bolt-on fitment
•   Will not break or crack like OEM GT3 mufflers do
•   Incorporates our signature cast X-pipe for superior flow and exhaust scavenging
•   Paired with our Side Muffler Bypass Pipes this muffler adds +27 ft/lbs of TQ and +16 WHP or +18 HP at the crank!
•   4 different tip options available
•   Completely retains PSE valved exhaust functionality
•   No Check Engine Light guaranteed
•   This cat-back system is emissions legal in all 50 states and the rest of the world
•   Built in house at Fabspeed Motorsport USA in Fort Washington, PA
•   Simple bolt-on installation, no cutting or welding required
•   All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty

As many GT3 owners know, the OEM mufflers are prone to cracking, breaking and blowing out, particularly the titanium mufflers on GT3RS cars. We wanted to design a muffler replacement that not only fixed that issue but also improved on the OEM design. Using our 25+ years of air and water-cooled experience, we took the valve open tubing to 2.75in / 70mm which is the optimal diameter for GT3 engines to have low restriction but maintain high velocity and high GT3 pitch for the signature GT3 CUP car sound. Then, we implemented our signature investment cast X-Pipe for optimal exhaust scavenging. The X merges the two cylinder banks without creating any restriction in exhaust flow. To maintain the factory muffler’s exhaust note and lack of drone, we mimicked Porsche’s 7 chamber design. This makes for a completely drone free muffler, even when running catless race headers! Pair this with Fabspeed Side Muffler Muffler Bypass Pipes for the ultimate emissions compliant GT3 exhaust. This muffler is guaranteed to NEVER BREAK or fail.

SOUND:
This muffler will have a very similar tone to the OEM muffler, however, it will be a bit louder with PSE turned on. It will also sound a bit smoother and higher pitched thanks to our signature X-pipe.

POWER:
On our 991.1 GT3RS test car, paired with Fabspeed Side Muffler Muffler Bypass Pipes, the Rennsport Muffler picked up an impressive 27 ft/lbs of TQ down low at 3,200 RPM. From 2,900 RPM all the way to 5,700 RPM it picks up 10 WHP or more, and peak WHP is up from 446 to 454! That’s a gain of 8 WHP or 9 HP at the crank.

NOTE:
•   Requires OEM gaskets and hardware to be reused
•   If they are not available here are the necessary part numbers. 
•     2x Muffler band straps (99711111970)
•     2x Bolt for muffler band strap (90006736201)
•     2x Each Side Muffler to Center Muffler Gaskets (99711156390, 99711156190)  

Please note: This is a special-order item manufactured to order. In some cases, please allow 4 – 5 weeks for the delivery. Special order items cannot be cancelled from this supplier once your order has been placed.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

FSPOR991GT3RSM

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