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Revolution Performance Bolt-On Big Bore Kit (98in. Flat Top) 3.9375 9.31
Revolution Performance Bolt-On Big Bore Kit 98in. 9.3:1 Compression - Natural Silver. Bolt-on big bore kits are exactly that, a bolt-on application for your engine.
No case boring or additional modifications/upgrades needed. However, additional modifications/upgrades will help make this bolt-on big bore kit a complete package. Monster big bore kits require modifications/upgrades to your engine that include: case boring, crankshaft balancing and CNC cylinder head upgrades.