Long Tube Sport Header and Sport Cat Set 997.1 - For Porsche Sport Exhaust (PSE) - 200 Cell Cats

Description

This long tube header set is specifically made for those who already have the Valved Porsche Sport Exhaust Muffler (PSE). This set of headers produces gains of + 18 HP and + 15 TQ which is greater than the conventional design and does not cause stress and cracking on the PSE like a conventional set of headers and sport cats would. This header set is manufactured by M&M Exhaust, GmbH in Germany. They manufacture a multitude of Porsche Motorsport, Race Exhausts and Street Exhausts. Each system is tested comprehensively for exhaust gas scavenging, flow velocity, thermal stress, cracking and longevity. M&M exhausts have competed in and won hundreds of 24-hour races over the years including Nürburgring, Le Mans, Dubai, Daytona to name a few. When you purchase these headers, you are the benefactor of all that Porsche racing experience. If you are looking for an exhaust product that can handle abuse on the street or track, look no further.

How are these headers different to the competition you ask? M&M manufactures in Germany and uses the highest-grade German V2A - X5CrNi18-10 - 1.4301 (T-304 L) light weight stainless steel, these headers only weigh 17.6 lbs (8 kg) which are 8.4 lbs (3.8 kg) lighter than the stock headers. They start with a laser cut, stainless steel, dual plated primary flange which is more labor intensive to manufacture. M&M's race experience with thick, single plated flanges warping with age, heat and vibration lead to costly performance losses which prompted them to engineer a more reliable design. Their double plated flange allows for greater thermal expansion which dissipates heat more efficiently, which equates to greater reliability on the track or street. Next, look at the hand ported primary inlets, again, this is a more labor-intensive method, but hand porting means more laminar flow which equates to greater exhaust gas velocity and more performance. The inlets lead us to the long tube, equal length primary tubing whose diameter is selected and designed specifically for your engine's displacement. Each primary tube is mandrel bent, segmented and purge TIG welded by hand. For those thinking, why aren't the primaries a seamless length of tubing like some others in the industry? Segmenting strengthens the primaries and prevents stress cracks commonly found with the competition's headers. M&M back purge TIG welds each joint which reduces carbide precipitation and means seamless internal welds for more laminar flow and greater performance. This primary design method has been proven over years of time under the toughest endurance racing conditions.

The 200 cell catalytic converters are made by HJS Emission Technology GmbH & Co.KG in Germany. They are nicknamed “HF” or high flow for their durable design. They have double foil design (winding of two flat and corrugated foils), which equates to durability for street use. We recommend the HF cats for owners who plan to use their cars on the street only. After the cat, the pipe paths are kept separate and have a U-Torque Design, M&M found that configuration will retain more low-end torque than a cross over pipe design. The post cat O2 sensors are added just before the bend which allows for simple connection with the existing wiring.

Features:
+ 18 HP and + 15 TQ
Long tube, equal length primary tubing
Internal merge collector – for increased velocity and laminar flow
German V2A - X5CrNi18-10 - 1.4301 (T-304 L) stainless steel for improved durability
200 Cell HJS Double Foil High Flow “HF” Sport Catalytic Converters
Hand-ported TIG welded inlets for optimized flow
Reduces back pressure and thermal stress
Increased torque and horsepower throughout the entire rev range
Slightly more decibels at lower rpms with the valves closed
Much greater decibel's at higher rpms with the valves open
Still a street-able sound but with a more pronounced exotic flat-6 exhaust note with the valves open
Made in Germany

Sold as a set. Includes right and left side.

Please note: This sport system is not C.A.R.B. certified (California) nor is it TÜV approved. We recommend FVD software tuning, as stock tuning can from time to time throw a check engine light (CEL) and will cause the car far to rich which can damage the sport cats. This is the perfect time to take advantage of our FVD Progressive Tuning Program, explained in our performance software option, like part # FVD99761810MG or FVD99761820MG for example. And please don't forget, if you already have FVD performance software, this exhaust purchase includes a free software update!