MAHLE Original Piston Rings - 4.040" Bore - File Fit - 1/16 x 1/16 x 3/16" Thick - Standard Tension 39000509 7/16 in Bore

7/16 in Bore

torque and lowering EGT's

Perfect for the daily driver that doesn't run like a daily driver

1989-1991 Oldsmobile Cutlass Calais

2008-2012 Chevrolet Express 3500

MAHLE Original Piston Rings - 4.040" Bore - File Fit - 1/16 x 1/16 x 3/16" Thick - Standard Tension 39000509 7/16 in BoreProduct Description: Piston Rings MAHLE Original 4. 040 in Bore File Fit 1 16 x 1 16 x 3 16 in Thick Standard Tension Steel Plasma Moly 8 Cylinder MAHLE Performance boasts the most extensive line of performance engine bearings in the market hands down. Combining the legendary CLEVITE bearing brand for domestic applications with the global coverage in the MAHLE brand for the import market, MAHLE Performance truly is the engine bearing of choice in the