Engine Performance

GrimmSpeed Dry-Con Air Filters

GrimmSpeed Dry-Con Air Filters

$59.00

GrimmSpeed Exhaust Gasket Set - Subaru WRX/STI/LGT/FXT/OBXT

GrimmSpeed Exhaust Gasket Set - Subaru WRX/STI/LGT/FXT/OBXT

$99.00

Electronic Boost Control Solenoid 3-Port - Subaru 08-21 STI

Electronic Boost Control Solenoid 3-Port - Subaru 08-21 STI

$129.00

Air/Oil Separator - WRX/STI/LGT/FXT

$299.00

Top Mount Intercooler Silicone Kit - Subaru

Top Mount Intercooler Silicone Kit - Subaru

$89.00

GrimmSpeed Manual Boost Controller MBC

Manual Boost Controller

$109.00

Up Pipe - WRX/STI/FXT/LGT/OBXT

$269.00

GrimmSpeed Subaru Lightweight Crank Pulley

Lightweight Crank Pulley - Subaru EJ Engines

$128.00

Top Mount Intercooler Aluminum Y-Pipe Kit - Subaru

$169.00

GrimmSpeed Adjustable Wastegate Bracket

Universal Internal Wastegate Bracket

$39.00

STANDARD MODEL GrimmSpeed Subaru Catted Downpipe

Catted Downpipe - 08-14 WRX / 08-21 STI / 05-09 LGT

$739.00

Dry Element Air Filter - 3.0" Inlet - Free U.S. Shipping!

Dry Element Air Filter - 3.0" Inlet - Free U.S. Shipping!

$60.00

Revision Intercooler options for 02-07 WRX and 04-17 STI

Top Mount Intercooler Kit - Subaru 02-07 WRX, 04-21 STI, 04-08 FXT

$719.00

GrimmSpeed Bypass Valve - 02-07 WRX, 04-21 STI

$229.00

GrimmSpeed Phenolic Thermal Manifold Spacer WRX/STI/FXT/LGT - 8mm

GrimmSpeed Phenolic Thermal Manifold Spacer WRX/STI/FXT/LGT - 8mm

$60.00

Lightweight Battery Mount Kit - Subaru 08-21 WRX/STI

Lightweight Battery Mount Kit - Subaru 08-21 WRX/STI

$99.00

GrimmSpeed Post MAF Hose Kit - 02-14 WRX/STI, 18-21 STI (15-17 STI w/OEM Sound Tube Delete)

GrimmSpeed Post MAF Hose Kit - 02-14 WRX/STI, 18-21 STI (15-17 STI w/OEM Sound Tube Delete)

$80.00

StealthBox Intake - 15-21 Subaru STI

StealthBox Intake - 15-21 Subaru STI

$349.00

15-21 WRX/STI Neon Green Engine Dress-up Kit

15-21 WRX/STI Neon Green Engine Dress-up Kit

$297.00

EJ25 0.78mm

GrimmSpeed EJ25 Head Gasket Sets

$139.00

Subaru Phenolic Thermal Manifold Spacer

GrimmSpeed Phenolic Thermal Manifold Spacer WRX/STI/FXT/LGT - 3mm

$50.00

Catback Exhaust System - Resonated - 11-21 WRX/STI Sedan

Catback Exhaust System - Resonated - 11-21 WRX/STI Sedan

$1,459.00

Front Mount Intercooler Kit - 2015-21 STI

Front Mount Intercooler Kit - 2015-21 STI

$1,559.00

Up Pipe, 3-Bolt Inlet - WRX/STI/LGT/FXT

Up Pipe, 3-Bolt Inlet - WRX/STI/LGT/FXT

$269.00

Radiator Hose Kit, Red - 08-11 Impreza, 08-14 WRX, 08-21 STI, 09-10 Forester, 09-13 FXT

Radiator Hose Kit, Red - 08-11 Impreza, 08-14 WRX, 08-21 STI, 09-10 Forester, 09-13 FXT

$110.00

Radiator Hose Kit, Black - 08-11 Impreza, 08-14 WRX, 08-21 STI, 09-10 Forester, 09-13 FXT

Radiator Hose Kit, Black - 08-11 Impreza, 08-14 WRX, 08-21 STI, 09-10 Forester, 09-13 FXT

$110.00

Catback Exhaust System - Un-Resonated - 11-21 WRX/STI Sedan

Catback Exhaust System - Un-Resonated - 11-21 WRX/STI Sedan

$1,349.00

GrimmSpeed Chase JB400 and Overtake BB500 Turbochargers

GrimmSpeed Chase JB400 and Overtake BB500 Turbochargers

$1,350.00

GrimmSpeed Subaru MAF Block Off

GrimmSpeed MAF Block Off - WRX/STI/FXT

$42.00

GrimmSpeed Sound Generator Plug Kit - 2015-17 STI

GrimmSpeed Sound Generator Plug Kit - 2015-17 STI

$35.00

Turbocharger Oil Feed Line Kit

Turbocharger Oil Feed Line Kit

$80.00

GrimmSpeed Post MAF Hose Kit - 15-17 STI (w/OEM Sound Tube)

$80.00

Turbocharger Coolant Line Kit

Turbocharger Coolant Line Kit

$50.00