Total Seal Classic Steel Advanced Profiling Top Ring File-Fit Piston Ring Set - Bore Size: 4.1130" - Top Ring: 1/16" - 2nd Ring: 1/16" - Oil Ring: 3/16" MT-PRO-MM-ICOM ApprovedMSD engineers fit all of

ApprovedMSD engineers fit all of their high performance distributor experience into a special compact housing designed to be less obtrusive for Ford engines

Dual 3 in Tube

Durable black finish

6061 anodized mounts

These straight through style mufflers feature a 409S stainless steel case and the quality you would expect from Flowmaster

Total Seal Classic Steel Advanced Profiling Top Ring File-Fit Piston Ring Set - Bore Size: 4.1130" - Top Ring: 1/16" - 2nd Ring: 1/16" - Oil Ring: 3/16" MT-PRO-MM-ICOM ApprovedMSD engineers fit all ofInstead of the gapless top or second ring, sets include conventional AP (Advanced Profiling) steel top rings, with extremely tight tolerances for superior compression sealing. Sets include AP top rings, conventional second rings and three piece, standard tension oil rings. All sets are for eight cylinders. Instructions for file fitting included. Total Seal is known for their piston ring sets. They offer a wide selection of off the shelf options and