BTR BTR33904I Budget LSx Front Timing Cover Gasket

The BTR BTR33904I is a budget-friendly, internationally-sourced front timing cover gasket designed for GM LSx engines. This is the value alternative to BTR's standard front timing cover gasket (BTR33904), offering reliable sealing performance at a lower price point — making it an ideal choice for builders looking to maximize savings without skipping critical sealing components.

Replacing the front timing cover gasket is an essential step any time the front cover is removed during a cam swap, timing chain replacement, or engine refresh. Reusing an old, compressed gasket risks oil leaks and compromised sealing integrity, so a fresh gasket is always the smart choice.

Key Features:

• Budget-friendly internationally-sourced version of the BTR33904 timing cover gasket
• Direct replacement for GM OEM part # 12633904 and superseded part # 12574294
• Also interchangeable with BTR's standard front timing cover gasket (BTR33904)
• Designed for Gen III and Gen IV LSx engines
• Suitable for cam swaps, timing chain service, and general engine rebuilds

Compatible with a wide range of GM LSx applications including LS1, LS2, LS3, LS6, LS7, LS9, and LSA engines. Cross-references: GM # 12633904, GM # 12574294, BTR33904.