Jeu collecteurs 991avec cata 200 cellules "HD"

Our entire Brombacher line of exhausts 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 at the 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) motorsport grade light weight stainless steel that are 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 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. The primary tubing leads us to the custom made, purge TIG welded, internally blended merge collector that smoothly transitions into the catalytic converter. The catalytic converters are made by HJS Emission Technology GmbH & Co.KG in Germany. They are nicknamed “HD” or heavy duty for their high durability matrix design. They have a SM-matrix (winding of three flat and corrugated foils) and a special connection to the matrix sheath, which equates to extremely high durability for track and street use. We recommend using the HD cats on all Direct Fuel Injection (DFI) motors as they produce much greater heat, so these cats have greater durability. After the cat, the piping smoothly transitions into a larger diameter outlet for greater scavenging effect. The header ends with a hand ported outlet and stock style, lighter weight 3 bolt flange. So, these headers can be run with an OE muffler, FVD sport muffler or another sport muffler that fits like factory.

Features:
+ 17 HP and + 14 TQ
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 German HJS "HD" triple foil sport catalysts
Hand-ported TIG welded inlets for optimized flow
Reduces back pressure and thermal stress
Increased mid-range torque and top end horsepower
Greater decibels at lower rpms with much greater decibel's higher rpms (with stock muffler)
Street-able sound with an exotic flat-6 exhaust note (with stock muffler)
Made in Germany

Sold as a set. Includes right and left side.

We recommend new gaskets and hardware for installation.

Please Note:Sport headers are not C.A.R.B. certified (California) nor EPA certified. They are for Racing use only. We recommend FVD software tuning with the addition of sport headers, as stock tuning can cause the car far to rich. That can lead to raw fuel being dumped on the cats, which can lead to damage and premature failure. This is the perfect time to take advantage of our FVD Progressive Tuning Program, explained in our performance software option. And please don't forget, if you already have FVD performance software, this header purchase includes a free software update! Want to know more about our headers? Check the multimedia tab.