Z20LEH 500BHP Engine Rebuild Kit – Forged Rods, Elring & ACL Components

Take your Z20LEH build to the next level with the UNA Performance 500BHP Rebuild Kit, designed for high-performance street and track applications.

Every component in this package has been carefully selected and tested in-house to handle up to 500bhp reliably — no unnecessary extras, no weak links.

This kit includes everything needed for a full bottom and top-end refresh, combining trusted OEM quality with proven aftermarket performance upgrades.

Kit contents:

TCC H-Beam Forged Steel Conrods – proven to handle up to 700bhp+

ACL Race Big End Bearings – high load, high RPM rated

OEM Main Bearings – factory reliability where it matters

Uprated Valve Stem Seals – eliminates oil consumption issues

Elring Head Gasket & Full Gasket Set – premium sealing throughout

Elring Sump Gasket Set & Crank Seals

Elring Head Bolts – OE torque and tensile strength

Mahle Piston Rings – factory-grade compression and oil control

This rebuild kit is built from real-world experience — the same combination used in UNA Performance Z20LEH engine builds that have proven reliability at over 500bhp+.

✅ 500bhp capable setup

✅ Direct fit for Z20LEH engine

✅ Suitable for Astra VXR / Zafira VXR

✅ Professionally curated for strength, reliability, and balance

Build it once — build it right with UNA Performance.