Long Tube Race Header and Cat Set 997.2 - Brombacher Edition - With Catalytic Bypass

Description

Our entire Brombacher Edition 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 and cats, you are the benefactor of all that Porsche racing experience. If you are looking for an extremely powerful exhaust product that can handle abuse at the track or on the street, look no further.

M&M tested several combinations and chose this header and bypass combination which provided the greatest horsepower and torque throughout the entire rpm band. This combination allowed for the longest header design to deliver the most torque and a bypass configuration which produces the most horsepower. M&M manufactures in Germany and uses the highest-grade German V2A - X5CrNi18-10 - 1.4301 (T-304 L) light weight stainless steel. 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 the 997.2. 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 primary tubing leads us to the custom made, purge TIG welded, internally blended merge collector that smoothly transitions into a larger outlet diameter for greater scavenging effect. The larger outlet includes the primary O2 port and ends with a hand ported outlet with lighter weight 3 bolt flange.

The bypass begins with a 3-bolt flange that are welded to pipes that have an expansion joint which is secured via springs. This is a high-end motorsports trick that prevents cracking, adds durability and simplifies installation. The bypass portion is hollow but visually appears like it has catalytic converters. After the cat, the pipe paths are kept separate but are welded together for strength, M&M found that configuration with stock or sport mufflers made more performance gains than an X pipe design. The post cat O2 sensors are added just before the bend which allows for simple connection with the existing wiring. The piping then smoothly transitions into the same diameter as the OEM muffler, Porsche Sport Exhaust (PSE) or an FVD Sport Muffler for simple installation.

Features:
997.2 | 3.6 L = 22 HP (16 kW) + 13 TQ (17 Nm) Gains
997.2 | 3.8 L = 25 HP (18.6 kW) + 20 TQ (27 Nm) Gains
Long tube, equal length primary tubing with 63,5 mm collector
Internal motorsport merge collector – for increased velocity and laminar flow
German V2A - X5CrNi18-10 - 1.4301 (T-304 L) stainless steel for improved durability
Catalytic Bypass | Requires ECU Software
Hand-ported TIG welded inlets for optimized flow
Reduces back pressure and thermal stress on the engine
Increased mid-range to top of the mid-range torque and top end horsepower
Replaces the stock header and primary muffler and plugs into the stock side mufflers
Made in Germany

Sold as a set. Includes right and left side.

In closing, the German made, FVD Brombacher brand offers you far more exclusivity than those common in the aftermarket. Stand out at your next track or coffee meet and watch the looks of envy when your friends hear this exhaust and feel the performance gains. After all, you own a German car for a reason and tuning with German made FVD Brombacher parts enhances the joy of ownership without regret.

Please note: Please add our header installation kit, part # FVDMK997203MM. Or separately engine to header gaskets 2 Qty. part # 99711110731 and 18 Qty. Header Torx Screws part # 99907353601 if you would like to change those. These race headers are not C.A.R.B. certified (California) nor are they TÜV approved or EPA certified and cannot be used on the street. We recommend FVD software tuning with the addition of headers, as stock tuning will throw a check engine light (CEL) and will cause the car far to rich which can damage the new sport cats. This is the perfect time to take advantage of our FVD Progressive Tuning Program, explained in our performance software option, like part # FVD99761860MG for example. And please don't forget, if you already have FVD performance software, this header purchase includes a free software update!