Fitment Guides

VW Golf GTI MK7 and MK8 First Mods: Intake, Downpipe and Tune
A qualified mechanic's take on the first three mods for a MK7 or MK8 Golf GTI: cold air intake, downpipe and tune, plus what to check before you buy and tips from the workshop. Read more...
Catted vs Catless Downpipes in Australia: What's Legal and What to Buy
Catted or catless? A qualified mechanic explains what a downpipe actually does, what the law says for road cars in Australia, and which one makes sense for your build. Read more...
Common Holden Commodore VT–VZ Faults and the Parts That Fix Them
A mechanic's run-down of the faults that show up again and again on VT to VE Commodores, and what to check before you buy parts. Read more...
Civic Type R FK8 and FL5 Downpipe Buying Guide: V1 vs V2, Catted vs Catless
V1 or V2, catted or catless, and what you'll need for install. A mechanic's guide to downpipes for the FK8 and FL5 Civic Type R. Read more...
Best First Mods for a B58 BMW or Toyota Supra
Just bought an M340i, M240i, M440i or GR Supra? Here's the order I'd modify a B58 in, and why. Read more...