Mahle Performance Series Piston Rings - 4.380 in Bore - 8-Cylinder GRT698 a vacuum advance canister provides

a vacuum advance canister provides economy and the proven MSD mechanical advance gives you the opportunity to dial-in a timing curve to fit your needs

It's the perfect marriage of simplicity and accuracy

this Powerpack can conquer even the most difficult cooling conditions

Combo arm has a 1" lead

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Mahle Performance Series Piston Rings - 4.380 in Bore - 8-Cylinder GRT698 a vacuum advance canister provides1. 5mm, 1. 5mm, 3. 0mm Standard Tension +. 005" File Fit Rings 4. 375"+0. 005 1. 5, 1. 5, 3. 0mm File Fit Rings. Product Description: Piston Rings Performance Series 4. 380 in Bore 1. 5 x 1. 5 x 3. 0 mm Thick Standard Tension Iron 8 Cylinder For over 80 years, MAHLE has numbered among the leading international manufacturers of high quality components for the automotive engine industry. From powering the Champions in the world's premier racing series