GrimmSpeed GRM093074 Top Mount Intercooler Splitter for WRX w/ JDM STI Scoop

Vehicle Fitment

• 2002-2003 Subaru Impreza WRX (with JDM STI Hood Scoop only)

Fitment Notes

• This item will only fit vehicles equipped with the 02-03 JDM STI hood scoop - not the standard WRX factory scoop
• Compatible with both the GrimmSpeed and OEM top mount intercooler (TMIC)
• WARNING: Cancer & Reproductive Harm - for more information, go to www.P65Warnings.ca.gov

Features

• Delivers a 70% increase in flow capacity to the top mount intercooler (TMIC)
• Fully harnesses the incoming air from the JDM STI hood scoop, ensuring maximum surface contact with the intercooler core
• Designed for even flow distribution across the entire intercooler core, maximizing cooling effectiveness
• Lowers TMIC outlet temperatures, enabling more aggressive tuning and more consistent power delivery during sustained boost
• CNC laser-cut 5052 aluminum construction for durable, lightweight strength
• Durable DuPont black powder-coated finish resists corrosion and wear
• Custom EPDM rubber gasket provides an excellent, long-lasting seal
• CAD-designed and simulation-validated for a precise fit against the JDM STI scoop and intercooler

Specifications

• Type: Top Mount Intercooler Splitter (Hood Scoop Splitter)
• Flow Increase: +70% to TMIC
• Material: 5052 Aluminum, CNC Laser-Cut
• Finish: Black DuPont Powder Coat
• Gasket: EPDM Rubber
• Compatible Scoop: JDM STI Hood Scoop (02-03)

Included Components

• 1x Top Mount Intercooler Splitter
• EPDM Rubber Gasket
• Mounting Hardware

Product Description

The GrimmSpeed GRM093074 splitter is purpose-built for 02-03 WRX owners who've swapped in the JDM STI hood scoop, addressing the same core problem as GrimmSpeed's standard splitter - ram air entering the scoop bypassing the intercooler fins instead of flowing through them. By channeling that incoming air directly onto the TMIC core, this splitter delivers a 70% increase in flow capacity, putting the STI scoop's extra intake area to genuine use.

Built from CNC laser-cut 5052 aluminum with a durable black powder-coated finish and sealed with a custom EPDM gasket, this splitter is engineered for a precise, long-lasting fit against both the JDM STI scoop and the top mount intercooler - whether running the GrimmSpeed unit or the factory OEM core. The result is lower charge air temperatures, reduced heat soak risk, and more consistent power delivery, making this a smart companion upgrade for anyone who's already invested in the STI scoop swap.