GrimmSpeed GRM093128 Top Mount Intercooler Splitter for Subaru STI 2015-2021

Vehicle Fitment

• 2015-2021 Subaru Impreza STI

Fitment Notes

• Designed to seal perfectly with a GrimmSpeed top mount intercooler (TMIC) - does NOT include the intercooler itself
• WARNING: Cancer & Reproductive Harm - for more information, go to www.P65Warnings.ca.gov

Features

• Purpose-built to maximize performance of GrimmSpeed's Top Mount Intercooler on the 2015+ STI platform - some users report producing 600-700 whp with a properly matched splitter and TMIC combination
• Increases the size of the opening to perfectly fit the GrimmSpeed TMIC, boosting internal core volume by as much as 200% versus the restrictive factory splitter
• Forces ambient air through the intercooler's dense core rather than around it, critical for effective cooling with high-density cores
• Designed in CAD for a perfect mating fit with the GrimmSpeed TMIC
• Laser-cut 5052 aluminum construction for durable, lightweight strength
• Addresses the reality that even mildly modified turbo engines can see intake air temperatures exceeding 400°F entering the intercooler, making effective ambient airflow critical
• Backed by GrimmSpeed's lifetime warranty

Specifications

• Type: Top Mount Intercooler Splitter (Hood Scoop Splitter)
• Material: 5052 Aluminum
• Core Volume Increase: Up to 200% vs. factory splitter opening
• Compatible Intercooler: GrimmSpeed TMIC

Included Components

• 1x Top Mount Intercooler Splitter
• Mounting Hardware

Product Description

The GrimmSpeed GRM093128 splitter was developed specifically to unlock the full potential of a GrimmSpeed top mount intercooler on the 2015-2021 STI, addressing the reality that a dense, high-performance intercooler core needs properly directed ambient airflow to actually work - some users running this splitter alongside a matched GrimmSpeed TMIC report producing 600-700 whp. By enlarging the opening to fit the GrimmSpeed TMIC, this splitter can increase internal core volume by as much as 200% over the restrictive factory splitter design.

Designed in CAD for a precise mating fit and laser-cut from durable 5052 aluminum, this splitter directs ambient air through the intercooler's dense core rather than letting it bypass the fins - critical given that turbo compression on these platforms can push intake air temperatures above 400°F before reaching the intercooler. Backed by GrimmSpeed's lifetime warranty, it's considered a must-have companion for STI owners already running a GrimmSpeed TMIC on this generation.