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GrimmSpeed Top-Mount Intercooler Kit exact part GRM090001, product view 1
GrimmSpeed Top-Mount Intercooler Kit exact part GRM090001, product view 2
GrimmSpeed Top-Mount Intercooler Kit exact part GRM090001, product view 3
GrimmSpeed Top-Mount Intercooler Kit exact part GRM090001, product view 4
GrimmSpeed Top-Mount Intercooler Kit exact part GRM090001, product view 5
GrimmSpeed Top-Mount Intercooler Kit exact part GRM090001, product view 6
GrimmSpeed Top-Mount Intercooler Kit exact part GRM090001, product view 7
GrimmSpeed Top-Mount Intercooler Kit exact part GRM090001, product view 8
GrimmSpeed Top-Mount Intercooler Kit exact part GRM090001, product view 9
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GrimmSpeed Raw Aluminum Top-Mount Intercooler Kit for 2002-2007 Subaru WRX and 2004-2021 STI

GrimmSpeed
GRMGRM090001
840410816347
Intercooler Kits
4 Units In Stock
$ 749.00 $ 744.00
$ 744.00

Give the WRX and STI a larger heat-resistant charge-air core

GrimmSpeed GRM090001 is the raw aluminum top-mount intercooler configuration for the listed Subaru platform. Its 17.5 x 8.7 x 3.5-inch cross-flow bar-and-plate core, cast aluminum end tanks, and matched splitter are engineered to balance heat transfer with low pressure drop.

Key Features

  • GrimmSpeed GRM090001: 17.5 x 8.7 x 3.5-inch cross-flow bar-and-plate core
  • Cast aluminum end tanks with machined interfaces
  • TIG-welded, pressure-tested, cleaned, and sealed assembly
  • Reinforced five-ply silicone couplers
  • Wide-mouth or integrated splitter directs hood-scoop air across the core
  • Vibration-isolated mounting reuses supported factory locations
  • Raw aluminum finish keeps the welded construction visible

Fitment

Use GrimmSpeed GRM090001 only for the applications below. Confirm every listed qualifier and exclusion.

Years Make Model Details
2002-2007 Subaru WRX top-mount intercooler position; compatible factory-style bypass-valve interface
2004-2021 Subaru STI top-mount intercooler position; compatible factory-style bypass-valve interface

Specifications

Detail Value
Brand GrimmSpeed
Manufacturer Part Number GRM090001
Product Type Intercooler Kits
Core Size 17.5 x 8.7 x 3.5-inch
Core Type Cross-flow bar-and-plate
End Tanks Cast and machined aluminum
Construction TIG welded and pressure tested
Couplers Reinforced five-ply silicone
Finish Raw Aluminum
Mounting Vehicle-specific top-mount position with matched splitter

What's Included

  • One GrimmSpeed top-mount intercooler for GrimmSpeed GRM090001
  • Vehicle-specific hood-scoop splitter
  • Reinforced silicone couplers
  • Clamps, brackets, and mounting hardware as packaged
  • Not included: Charge pipe unless specifically packaged, bypass valve, tuning, replacement hood scoop, and unrelated service parts

About GrimmSpeed

GrimmSpeed engineers Subaru charge-air hardware for the WRX and STI platform, combining vehicle-specific mounting with pressure-tested aluminum construction and matched airflow components.

Related Parts

  • No internal link was added because no exact compatible ACTIVE charge-air component was verified for this package.

FAQ

What is the GRM090001?

It is a top-mount intercooler kit in the raw aluminum configuration for the listed Subaru application.

What vehicles does this part fit?

Verified applications are 2002-2007 Subaru WRX; 2004-2021 Subaru STI; match the engine, charge-air layout, and all listed qualifiers before ordering.

What is included in the package?

The package contains the product-specific charge-air component plus the couplers, clamps, brackets, splitter, seals, or hardware identified for this exact configuration.

Does this part require tuning?

Calibration needs depend on the complete vehicle setup and boost targets. Consult a qualified Subaru tuner before increasing boost or combining airflow modifications.

Is professional installation recommended?

Professional installation is recommended so sealing surfaces, clamps, clearances, and boost-leak testing can be completed correctly.

What warranty applies?

Confirm the current GrimmSpeed warranty terms and exclusions for the exact component before installation.

How should the charge system be checked after installation?

Pressure-test the system, verify all clamps and electrical connections, and check for rubbing, leaks, or abnormal bypass-valve operation.

Does the finish change fitment?

The listed finish identifies this exact configuration; fitment remains controlled by the vehicle, engine, interfaces, and package contents shown in the fitment section.

Installation Instructions

  1. Confirm the exact WRX and STI model-year application, turbo layout, and raw aluminum configuration before opening the charge system.
  2. Allow the engine to cool, remove the original intercooler and splitter, and protect all open intake connections from debris.
  3. Transfer only the factory parts identified by GrimmSpeed, then install the intercooler, couplers, clamps, and vibration-isolated mounts without preloading the assembly.
  4. Install and align the supplied splitter so hood-scoop air reaches the full core without rubbing hoses, wiring, or the hood.
  5. Pressure-test for boost leaks, verify bypass-valve operation and clearances, and use calibration appropriate for the complete vehicle setup.

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