Headers & Manifolds
HiFlow Exhaust Manifold Crosspipe - Subaru 06-0...
1/2"+ Thick Flanges, 14 Gauge Tubing, TRIPLE Layer Flex Joint. We are DURABILITY. Up until now al...
1/2"+ Thick Flanges, 14 Gauge Tubing, TRIPLE Layer Flex Joint. We are DURABILITY. Up until now all of you 06-07 WRX and 04-08 FXT guys have been unable to swap in a higher flowing exhaust manifold crosspipe because Subaru decided to change up the design in those years. Well today is your day, we have created an 06-07 WRX/04-08 fXT specific HiFlow Crosspipe!! Subaru supplies its turbo owners with a tiny little crosspipe from the factory. 50% of your exhaust gasses are passing through this tiny...
HiFlow Exhaust Manifold Crosspipe BLACK CERAMIC...
1/2"+ Thick Flanges, 14 Gauge Tubing, TRIPLE Layer Flex Joint. We are DURABILITY. Subaru supplies...
1/2"+ Thick Flanges, 14 Gauge Tubing, TRIPLE Layer Flex Joint. We are DURABILITY. Subaru supplies its turbo owners with a tiny little crosspipe from the factory. 50% of your exhaust gasses are passing through this tiny pipe and, well, that's just a problem. Do not worry though, GrimmSpeed has a solution for you! The GrimmSpeed Subaru HiFlow Crosspipe is made of 304 Stainless Steel (flanges, flex, tubing) and has a pipe-wall thickness of 14 Gauge, this is the most "heavy-duty" pipe you will f...
HiFlow Exhaust Manifold Crosspipe - Subaru 02-0...
1/2"+ Thick Flanges, 14 Gauge Tubing, TRIPLE Layer Flex Joint. We are DURABILITY. Subaru supplies...
1/2"+ Thick Flanges, 14 Gauge Tubing, TRIPLE Layer Flex Joint. We are DURABILITY. Subaru supplies its turbo owners with a tiny little crosspipe from the factory. 50% of your exhaust gasses are passing through this tiny pipe and, well, that's just a problem. Do not worry though, GrimmSpeed has a solution for you! The GrimmSpeed Subaru HiFlow Crosspipe is made of 304 Stainless Steel (flanges, flex, tubing) and has a pipe-wall thickness of 14 Gauge, this is the most "heavy-duty" pipe you will f...
Equal Length Header - Subaru 15-21 WRX
The Highest Quality, Built to Last! Over the years, GrimmSpeed has proven that our exhaust produc...
The Highest Quality, Built to Last! Over the years, GrimmSpeed has proven that our exhaust products are some of the highest-quality and best-performing in the industry because of the detail oriented approached that we put into their development. When it comes to improving on an OEM design, this attention to detail and overall exhaust knowledge allows us to identify aspects of the factory parts that can be greatly improved upon. One of the first things to note about the OE exhaust manifold are...
EL 2-Bolt Holy Header Max (COAT + CYL 4 BUNG)
The Killer B Motorsport Holy Header VE-Max was developed using state of the art CAD software, sim...
The Killer B Motorsport Holy Header VE-Max was developed using state of the art CAD software, simulations, and testing, to determine optimal high power and RPM efficiency. High velocity merge collector into a stepped 2.5" secondary, the Holy Header VE-Max is for very high flow applications. Symmetrical 4-1 design maintains consistent and high velocity exhaust gas flow as RPMs rise. Large Secondary. The Holy Header Max was designed for higher flow rates with s stepped and large diameter second...
EL 2-Bolt Holy Header Max (COAT + ALL CYL BUNG)
The Killer B Motorsport Holy Header VE-Max was developed using state of the art CAD software, sim...
The Killer B Motorsport Holy Header VE-Max was developed using state of the art CAD software, simulations, and testing, to determine optimal high power and RPM efficiency. High velocity merge collector into a stepped 2.5" secondary, the Holy Header VE-Max is for very high flow applications. Symmetrical 4-1 design maintains consistent and high velocity exhaust gas flow as RPMs rise. Large Secondary. The Holy Header Max was designed for higher flow rates with s stepped and large diameter second...
EL 2-Bolt Holy Header Max (COAT NO BUNG)
The Killer B Motorsport Holy Header VE-Max was developed using state of the art CAD software, sim...
The Killer B Motorsport Holy Header VE-Max was developed using state of the art CAD software, simulations, and testing, to determine optimal high power and RPM efficiency. High velocity merge collector into a stepped 2.5" secondary, the Holy Header VE-Max is for very high flow applications. Symmetrical 4-1 design maintains consistent and high velocity exhaust gas flow as RPMs rise. Large Secondary. The Holy Header Max was designed for higher flow rates with s stepped and large diameter second...
EL 4-1 Holy Header 2-Bolt Manifold (COAT + CYL ...
The Killer B Motorsport Holy Header was developed using state of the art CAD software & simul...
The Killer B Motorsport Holy Header was developed using state of the art CAD software & simulations to determine optimal design to increase power as much as possible throughout the rev range. Short as possible primaries with a single secondary significantly decrease header volume allowing exhaust gas pressure to build quickly. Symmetrical 4-1 design maintains high and consistent exhaust velocity as RPMs rise. You can expect faster spool up time compared to long primary/double secondary de...