GrimmSpeed Phenolic Thermal Manifold Spacers for EJ WRX/STi Select::3mm Spacers (018001) the adapter now has counter-sunk

the adapter now has counter-sunk holes and is machined in-house at STM

MAF flanges are CNC machined from 6061 aluminum and the intake tube is fabricated from custom bent tubing

The Sparco PRO ADV QRT features a new head restraint redesign for smaller cockpits

8 V Input Voltage 100-120VAC

This product has been permanently discontinued from HKS and is no longer available

GrimmSpeed Phenolic Thermal Manifold Spacers for EJ WRX/STi Select::3mm Spacers (018001) the adapter now has counter-sunkThe GrimmSpeed phenolic intake manifold tgv to engine thermal spacers have been designed to absorb the heat that generates between the intake manifold and the engine block to help reduce the heat in your intake manifold. Tests show a 1% increase in horsepower for every 5F of heat reduction. Available in a 3mm or 8mm thickness. Hardware is included with the 8mm set. Vehicle Fitment: 2002 2014 Subaru WRX 2004 2021 Subaru STi Install Notes: GrimmSpeed