Tech Guides

Why factory plastic-tank radiators fail at 8-10 years, why repairs don't hold long-term, and what makes a quality all-aluminium performance radiator worth the upgrade.

R-Series, V-Core, Hyper V-Core, N-Flo, HH Series - KOYORAD's lineup looks overwhelming until you understand what each one does. This guide breaks down the real engineering differences, when each se...

Both Civic Type Rs are brilliant, but once you start modifying them, the FK8 and FL5 diverge in ways the spec sheet doesn't show. From the MAF sensor change nobody talks about to which parts actual...

The PRL HVI ships with a choice of two billet MAF housings - Street MAF and Race MAF. Get it wrong and you'll either leave power on the table or trigger check engine lights. Here's exactly how to c...

Injector Dynamics has officially released the full X-Series range for the Toyota GR Yaris and GR Corolla - ID1050-XDS, ID1300-XDS and ID1750-XDS. This buyer's guide breaks down each injector, who i...

Just fitted a set of AST or MOTON coilovers? This guide walks you through exactly how to adjust 1-way, 2-way, and 3-way dampers - no engineering jargon, just where the knobs are, which way to turn ...

Not all coilovers are created equal. This guide breaks down 1-way, 2-way, and 3-way adjustable damping, what each setting actually controls, and how AST Suspension's 5100, 5200, and 5300 Series map...

You've upgraded pads and flushed fluid, but the pedal still goes long after a few hard stops. 2-piece rotors come up as the next step - here's what they actually do, when they're worth the money, a...

Every DIXCEL compound explained - EC, Premium, M, ES, S, Z, RA, RE, Specom-B - with operating temperatures, friction coefficients, dust behaviour, and who each pad actually suits.