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INSTALL YOUR AFTERMARKET CATBACK THE RIGHT WAY! Exhaust leaks seem to be an all-too-common issue with most modded Subarus. They tend to spring up out of nowhere and cause hours...$57.00
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Grimmspeed Hella Horn Kit with Mounting Bracket + Wiring Harness - Subaru WRX / STI 2002-2021
Hella Horns are known worldwide for being the loudest and most attractive looking Subaru aftermarket horns available. They deliver a high quality sound with OEM fitment. Trust Hella Horns for...From $98.82 -
Grimmspeed Wiring Harness Hella Horns - Subaru WRX / STI 2015-2021
When it comes to wiring the Hella Horns mounted to your beautiful GrimmSpeed BroTie Bracket, we have you covered. Don"t stress yourself with trying to make a Hella horn harness...$39.00 -
GrimmSpeed BroTie Mounting Bracket - Hella Horns Subaru WRX / STI 2002-2021
One bracket to rule them all. Fits ALL US WRX and STI Models - 2002-2016 fitments confirmed Extremely Adjustable - Mount them wide, tight, high, low or anywhere in between Heavy Duty...$45.00 -
GrimmSpeed Turbo to Downpipe Gasket - Subaru Turbo
GrimmSpeed OEM Style Gasket, OEM quality without the high OEM price. GrimmSpeed has worked with endless amounts of aftermarket gaskets, none seem to work as well as the multi-layer steel...$19.00 -
Grimmspeed Electronic 3-Port Boost Control Solenoid Kit - Subaru WRX 2015-2021
An elegantly engineered solution. Custom Machined Adapter - Makes use of the factory inlet recirculation port, instead of blocking it off Black Anodized Finish - Protects the assembly from corrosion in an extremely...$169.00 -
GrimmSpeed J-Pipe Hardware Kit - Subaru WRX 2015-2021
The turbo studs on the FA turbo motors are notoriously difficult to deal with. If you're lucky enough to get the nuts off without drama originally, be sure to replace...$49.00 -
Improve the style and Increase Flow! Most adjustability was available on the market. Mounts in OEM tow hook location (No cutting or drilling required) Simple stainless steel Allen key hardware Will...$79.00
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Grimmspeed 3in Downpipe Adapter - AFTERMARKET DP>OEM SUBARU CATBACK
Kill that exhaust leak for GOOD! This adapter only works with flared end and it creates a smooth transition from your 3in downpipe to your OEM midpipe. Features: Flanged for...$57.00 -
GrimmSpeed Up Pipe to Turbo Gasket - Subaru
GrimmSpeed OEM Style Gasket, OEM quality without the high OEM price.GrimmSpeed has worked with endless amounts of aftermarket gaskets, none seem to work as well as the multi-layer steel oem...$16.00 -
GrimmSpeed Turbo to J-Pipe Gasket Subaru WRX 2015-2021 / Forester XT 2014-2018
GrimmSpeed™ OEM Style Gasket, OEM quality without the high OEM price. At GrimmSpeed™ we have worked with endless amounts of aftermarket gaskets, none seem to work as well as the...$29.00 -
GrimmSpeed Exhaust Gasket Set - Subaru WRX 2015-2021
The WHOLE Package! GrimmSpeed knows that many of you replace all of your exhaust gasket at the same time while installing aftermarket exhaust parts on your car. We've decided to...$89.00 -
Grimmspeed Adjustable Wastegate IWG Bracket - Universal
THIS IS A UNIVERSAL FITMENT PRODUCT, PLEASE ENSURE YOU HAVE VERIFIED FITMENT PRIOR TO PURCHASE.The internal wastegate(IWG) bracket is used in place of the stock wastegate actuator when moving to...$39.00 -
Grimmspeed 3-Port Electronic Boost Control Solenoid - Subaru 08-21 STI
GrimmSpeed is proud to provide the most complete and easy to use 3-Port Electronic Boost Solenoid for available for all turbo Subarus. Unlike your OEM 2-port solenoid, the GrimmSpeed BCS will allow for extremely...$129.00 -
Grimmspeed Fender Shroud - Red Subaru WRX / STI 2015-2021
Do away with the flimsy, boring factory fabric shrouds and make your engine bay stand out with the GrimmSpeed Fender Shrouds for the 2015+ WRX/STI. These Fender??Shrouds are each made...$89.00 -
The factory pitch stop mount is often overlooked and leaves a lot of room for improvement, both in performance and aesthetics. The OEM piece is made from flexible plastic and...$99.00
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Grimmspeed Radiator Shroud - Subaru WRX / STI 2015-2021
At GrimmSpeed we pride ourselves in the design of our aesthetic pieces just as much as our performance parts. The brand new GrimmSpeed Radiator Shroud for the 2015-2019 Subaru WRX/STI...$89.00 -
Grimmspeed Catted J Pipe Downpipe - Subaru WRX 2015-2021 6MT
Meticulous engineering meets elegant design. With the 2015 J-Pipe, the devil is truly in the details and the product development team here at GrimmSpeed has taken the time necessary to...$829.00 -
GrimmSpeed Downpipe to Catback 3in Gasket - Universal
THIS IS A UNIVERSAL FITMENT PRODUCT, PLEASE ENSURE YOU HAVE VERIFIED FITMENT PRIOR TO PURCHASE. Tired of the endless searching for a 3" 2 Bolt premium gasket that doesn't...$22.00 -
GrimmSpeed Lightweight Battery Tie Down Fits All Subaru Models
Lightweight Battery Tie Down by Grimmspeed Clean up that engine bay and show your GrimmSpeed pride with our newly designed Subaru Battery Tie Down. Laser cut then CNC bent and...$39.00 -
Grimmspeed 3-inch Catted Downpipe - Subaru 08-14WRX / 08+STI / 05-09LGT
USA's Finest Downpipe. Proudly made in the USA - Design, Materials and Fabrication Innovative 3-D Contour Flange (Limited models only) FARO™ Arm Designed - We are at the leading edge of new product...$739.00 -
GrimmSpeed Head to Exhaust Manifold Gaskets (Pair) Suabru Turbo Models
GrimmSpeed™ OEM Style Gasket, OEM quality without the high OEM price. At GrimmSpeed™ we have worked with endless amounts of aftermarket gaskets, none seem to work as well as the...$22.00 -
GrimmSpeed 04-21 Subaru STI Bypass Valve - Red Air Freight Prohibited: false Not Carb Approved: false Ltl Freight Required: false Prop 65: Unknown Epa: N/A$229.00
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GrimmSpeed 12mm Two Position Poly Exhaust Hanger Set of 4 Universal
These are the GrimmSpeed 12mm Two-Position Polyurethane Exhaust Hangers. After a while, your factory exhaust hangers can become weak causing excessive movement and rattling of your exhaust system which can...$40.00
2015 Subaru WRX ViS Trunk
GrimmSpeed offers a wide variety of aftermarket performance parts for your WRX. Aftermarket OEM parts can be hit or miss with their quality. Buy the replacement parts or upgraded parts that you know you can trust and will also help you get the most performance out of your vehicle. GrimmSpeed parts and accessories are manufactured from the highest quality materials designed to perfectly fit your vehicle and last longer than the originals. GrimmSpeed parts allow you to fully customize your vehicle with different color shifter knobs, red or black radiator shrouds, GrimmSpeed electronic boost control solenoids, GrimmSpeed air/oil separators, and so many other GrimmSpeed accessories. Some of the GrimmSpeed accessories include license plate relocation kits, top mount intercooler splitters, stainless steel alternator covers, and GrimmSpeed J Pipe.
Innovative GrimmSpeed Performance Parts
GrimmSpeed’s innovative parts allow you to uniquely build your car the way you want to. GrimmSpeed offers improved parts to replace your OEM ones like the GrimmSpeed red strut tower brace and the GrimmSpeed hood struts. If you’re looking to replace the smaller exhaust components, then we’ve got you covered. GrimmSpeed 38/40mm and 45/55mm V-Band external wastegate uppipe 3-bolt is the perfect wastegate to accompany your heads and allow that extra flow of air to continue down the line.
Quality Grimmspeed Accessories
GrimmSpeed thought of everything when it comes to all of the accessory parts necessary to make your build possible and the best it can be. Quality accessory materials and parts can be hard to come by, but you’ll find everything you need here at JDMuscle. Whether you’re looking for a stretch belt pulley adapter or turbo and O2 housing gaskets, you’ll find it all here. Other GrimmSpeed accessories include master cylinder braces, lightweight crank pulleys, external wastegate block off plates, and GrimmSpeed boost controller.
