GrimmSpeed Inlet Build Package for the Subaru WRX 2015-2021

GRM.1308.5.BLK / GRM.1308.5.RED - GrimmSpeed Inlet Build Package for the Subaru WRX 2015-2021

Crank Up the Boost Control. Clean Up the Airflow.

If you’re chasing better turbo response, more stable boost, and cleaner airflow through the FA20DIT, this one’s for you. The GrimmSpeed Inlet Build Combo brings together three key components that fix the weak points in your WRX’s intake and boost control system—all in one ready-to-go package.

What’s Included

• GrimmSpeed Version 2 Turbo Inlet – Featuring a one-piece cast aluminum construction, this inlet replaces the flimsy, restrictive factory unit and eliminates the common collapse points. Built to handle serious boost with zero compromise on fitment.

• GrimmSpeed Version 2 Bypass Valve – A performance-minded recirculating valve that responds faster, seals better, and holds more boost than stock. It’s a must-have for tuned cars or anyone looking to firm up throttle transitions and spool response.

• GrimmSpeed Electronic Boost Control Solenoid (3-Port) – The industry-standard 3-port EBCS that lets your tuner dial in more accurate and consistent boost curves. Faster response, better control, and proven durability under pressure.

A Smarter Air and Boost Setup

This combo is designed for WRX owners who want a no-compromise solution to support tuning, improve reliability, and clean up their engine bay with parts they can trust. Each piece works in sync to help you hold boost more consistently and make better use of the air you're pushing through the system.

Package and Save

Buying all three parts together not only gives you a solid, complete solution—it also saves you cash compared to grabbing them one by one. This is the kind of combo that gives you performance and peace of mind in a single box.

Options and Part Numbers

Circuit Spec R offers Free Shipping within the contiguous US. Confirm the vehicle application and selected options before ordering.