MAHLE 42001CP.030 Premium Piston Ring Set 0.030" Oversize Toyota 3.4L 5VZ-FE

The MAHLE 42001CP.030 is a premium OE-replacement piston ring set engineered for the Toyota 3.4L 5VZ-FE DOHC V6 engine, sized at 0.030" over standard bore. Manufactured by MAHLE — one of the world's largest OE piston ring suppliers — this set is built to exact original equipment specifications for form, fit, and function, making it an ideal choice for engine rebuilds or addressing oil consumption and compression loss.

Key Features:

• OE Form, Fit & Function: Designed to match original equipment specifications for a precise, reliable fit
• SAE 9254 High Alloy Steel Construction: Delivers higher tensile and yield strength, extended fatigue resistance, and increased material hardness
• Plasma-Moly Top Ring Facing: Reduces friction and promotes rapid, efficient seating against the cylinder wall
• CP-20 Oil Ring Assembly: Features an exclusive 20-degree ear angle for optimal side sealing in the piston oil ring groove and simplified installation
• Pre-Lapped Finish: Rings seat immediately upon installation, virtually eliminating traditional break-in time
• CNC-Controlled Gap Chamfer: Optimizes compression and reduces combustion blow-by
• 0.030" Oversize Bore: Engineered for use with bores that have been machined 0.030" over standard for worn or damaged cylinders

Piston rings seal the combustion chamber to prevent combustion gases from entering the crankcase and to keep engine oil out of the combustion process. If your engine is burning oil, losing compression, or undergoing a full rebuild, replacing the piston rings with a quality set like this MAHLE kit is essential for restoring performance and long-term engine health.