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Piston Pin Upgrades: Why Gudgeon Pins Matter in High-Performance Engines When people talk pistons, they focus on brand, compression ratio, coatings, and ring packs. Very few spend much time thinkin...

Why Your Choice of Conrod Bolts Might Be the Most Important Decision in Your Engine Build When people spec an engine build, they’ll argue piston brands, compression ratios, rod styles, and coatin...

Titanium Valve Spring Retainers: What They Are and Why They Matter A practical upgrade for high-RPM reliability, valve control, and performance If you’ve ever built (or planned...

ACL Releases New BMW Performance Bearing Application Guide A Deep Dive Into ACL’s BMW Engine Bearing Range ACL has officially released its latest BMW Application Guide for ACL ...

Importing Orders Over NZD $1,000 into New Zealand: Spool Imports Customer Guide If you are a New Zealand customer ordering performance engine parts from Spool Imports in Austral...

Haltech ECU Buyer’s Guide – Which Haltech ECU Is Right for Your Build? Choosing the right Haltech ECU can feel overwhelming – especially with options like the Elite 550, Elite 750, Elite ...

Understanding ARP Bolt Materials: 8740 vs ARP2000 vs L19 vs CA625+ | Spool Imports Understanding ARP Bolt Materials: 8740 vs ARP2000 vs L19 vs ...

Forged vs Billet Crankshafts — what’s really different, and which one’s right for your build? At Spool Imports, we’ve designed and tested both types across LS, RB, and Barra platforms to handl...

Toyota’s 1JZ and 2JZ engines are two of the most iconic inline-sixes ever built. Found in Supras, Soarers, Aristos and Chasers, they’ve become the go-to platform for tuners and racers chasing big ...

Full Counterweight LS Crankshafts: Why They’re Better — and the Block Clearancing You’ll Need Chasing reliability in a serious LS build? A full counterweight (CCW) crankshaft is one of the mo...