Tech Guides
Intake
TGV Deletes Explained — What They Do and When You Need Them
What are TGV deletes and when do you actually need them? How removing the factory tumble generator valves improves airflow, throttle response, and reliability on EJ-powered Subaru WRX and STI builds.
Exhaust
Cat-Back vs Turbo-Back Exhaust — Which One Do You Actually Need
Cat-back or turbo-back - which one do you actually need? We break down power gains, cost, sound, and whether upgrading in stages or buying the full system makes more sense.
Buyer's Guide
The Complete Guide to Upgrading Your WRX & STI Exhaust System
Every component of the WRX and STI exhaust explained - headers, downpipes, cat-backs, and turbo-backs. What each upgrade does, what power to expect, and what supporting mods you need at each stage.
Blouch
Which Blouch Turbo for Your WRX or STI? Complete Dominator Comparison Guide
Which Blouch Dominator turbo suits your WRX or STI build? We compare the 1.5, 2.5, 3.0 XT-R and G2R series by power, spool characteristics, and the supporting mods each one needs.