Akrapovic Exhaust System for Porsche 911 GT3 (991.1)

 The Akrapovic Slip-On system is based on the same layout as the original exhaust system of the GT3 with valve control. The Slip-On contains a titanium muffler with two double round tailpipes. The muffler is easily installed on the original exhaust system. The 911 GT3 equipped with an Akrapovic Slip-On exhaust system is more powerful and lighter, even though the exhaust system is not replaced entirely. The sound of its six-valve engine is also noticeably improved. A look at the numbers reveals that the Slip-On offers weight reduction in the rear of the Porsche and an increase in power. Two tailpipes, 100 mm in diameter, make it clear that the Akrapovic Slip-On system is no ordinary exhaust.

Finish the system with a pair of eye-catching double round tailpipes, made of high - grade titanium.

Evolution Header Set converts the slip-on system into a full system designed to give noticeably increased power at higher revs. Handcrafted titanium headers incorporate 100 cpsi sports catalytic convertors and side mufflers—all designed to increase power and torque—the Evolution Header Set utilizes integrated catalytic convertors and the functionality of the exhaust valves to deliver an out-and-out attack on the senses. With the valves in the open position, it delivers a sportier and hard-hitting sound, but also has the option of a lower sound level when the valves are closed, perfect for use in more everyday locations. Offering an increased weight savings in the area behind the engine and the rear axle, the reduction will enhance the handling and improve performance.

When installing Akrapovic aftermarket optional link pipes with sports catalytic converters or without catalytic converters, which are developed for use on closed tracks only, remapping the ECU is mandatory. When installing Akrapovic aftermarket exhaust system that was developed for use on closed tracks, we recommend remapping the ECU in order to prevent potential »check engine light« warning signals.

THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.

Evolution Race Header Set converts the slip-on system into a full system, built for the track and gives the Porsche GT3 the extra performance to match. Handcrafted titanium headers incorporate 100 cpsi sports catalytic convertors and titanium flanges—cast in Akrapovic’s own foundry. The system offers a perfect power curve right from 3,000 rpm to the very top of the power band, designed to continually increase performance as the revs rise. Along with improved torque and the maximum weight savings to enhance handling, adding the Evolution Race Header (Set)  will have the car performing like a true cup racer—with a deep, loud, and powerful Akrapovic racing sound to match its performance.

When installing Akrapovic aftermarket optional link pipes with sports catalytic converters or without catalytic converters, which are developed for use on closed tracks only, remapping the ECU is mandatory. When installing Akrapovic aftermarket exhaust system that was developed for use on closed tracks, we recommend remapping the ECU in order to prevent potential »check engine light« warning signals.

THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.

Link pipe set (Titanium)was tested and developed together with Slip-On Race Line (Titanium) system.

Adding the link pipe set is the second step in the exhaust tuning process. Combination with Slip-On Race Line retains the original Porsche GT3 exhaust manifold, utilizing the existing integrated catalytic convertors. The perfectly balanced titanium slip-on system and superbly fitting link pipes are all set off with a pair of beautiful titanium tailpipes. Developed primarily for track use, the Slip-On Race Line with Link Pipe Set (Titanium) increases power and torque levels and with the huge reduction in weight in the area behind the engine and the rear axle (in comparison to the original system) handling is improved to make the car and exhaust work in perfect harmony.

THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.

Designed to make the GT3 stand out from the crowd even more, the visual delight of Akrapovic exhaust systems can be further enhanced with the addition of an optional carbon fibre rear diffuser. It’s beautifully handcrafted from the finest materials and is designed to enhance the exclusive look of the titanium tailpipes. The ABE type-approved diffuser is a must-have extra for any discerning owner and shows that the GT3 means business, even when it’s standing still.

This product does not fit on GT3 RS model.

Designed and constructed exclusively for the Porsche 911 GT3 (991) and GT3 RS (991), the Akrapovic dB reducer (Titanium) is aimed at driving enthusiasts who need to keep the noise of the exhaust within approved levels during track-day use. Made from high-grade lightweight titanium, the dB reducer works like an additional muffler to allow extra expansion of the exhaust gases. It is easily fitted by simply removing the Akrapovic tailpipe set and then mounting the dB reducer in place. After installation, the Akrapovic dB reducer (Titanium) reduces dynamic sound levels* by approximately two or three decibels** while still retaining the unique Akrapovic sound and character. It is designed to fit and reduce the measured dynamic sound levels of all Akrapovic systems for the Porsche 911 GT3 (991) and GT3 RS: the Slip-On Line (Titanium), Evolution Line (Titanium), Sports Cup Line (Titanium), and Evolution Race Line (Titanium). The Akrapovic dB reducer (Titanium) is also totally compatible with the optional Akrapovic carbon-fibre diffuser, which is available for the Porsche 911 GT3 (991).

The Akrapovic dB reducer (Titanium) fits also to the stock exhaust system of the 911 GT3 (992) and GT3 RS (992). 

*Dynamic sound levels apply to a moving vehicle and not the volume from a static vehicle.

**Noise reduction value is relative (or may vary) due to various noise-measuring methods used and external conditions at different racetracks.