Description
The ULTIMATE OEM style high performance replacement muffler for your GT3!
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 our 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 our 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.
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!
- 3 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
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)
Warranty
Our warranty terms are based on each manufacturer’s guidelines. Depending on the specific manufacturer, customers may be eligible to process warranty claims either directly with the manufacturer or through us. For detailed information or assistance with warranty inquiries, please contact our support team.
Shipping & Returns
Shipping time will be provided once your order has been processed. Please note that shipping options cannot be changed after your order has been placed.
For returns, kindly contact our support team for guidance. We'll walk you through the process and ensure everything goes smoothly.
Frequently Asked Questions
OEM (Original Equipment Manufacturer) parts are made by the vehicle’s original manufacturer and guarantee perfect fit and performance. Aftermarket parts are produced by third-party companies and may offer enhanced performance or cost savings, but compatibility should always be verified before purchase.
Yes, we work with a network of certified and approved workshops to ensure professional installation of your performance parts. Get in touch with us to find a recommended installer near you.
Yes, but it’s important to ensure they work together without causing performance issues. Some aftermarket parts are designed to complement OEM components, while others may require full system upgrades.
Yes, once your order is shipped, a tracking number will be emailed to you.
Orders can only be modified or canceled before they are processed. Please reach out to us as soon as possible.
If you're not completely satisfied with your purchase, you may return it within 7 days of receiving your order for a full refund, excluding delivery costs. Please note that this policy does not apply to special order parts. To qualify for a refund, items must be unused and returned in their original packaging.