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The Mahle Performance plain ring set is a 4.740-inch bore, 2.0mm thickness, .129-inch ring assembly listed for NHRA Pro Stock use. It’s presented as a precision replacement ring set matching the specified bore and clearance. This plain ring assembly suits high-spec rebuilds calling for the stated dimensions and Pro Stock-compatible part form, offering exact sizing for engine builders working to those tolerances.
Mahle Rings Performance Oil Ring Assy 4.740in x 2.0MM .129in RW GNS NHRA Pro Stock Plain Ring Set
