This is the most popular engine kit for the 660 raptor because it offers the best bang for the buck. The main reason this is the choice of many is because the stock rod isn't strong enough to hold up to high horse power engines. When you upgrade to a heavy duty rod the cost is almost as high as installing a +4mm crank. This means for roughly the same price as a rod installation you can have a brand new +4mm crank that is trued, welded, and it already has a stronger rod!
These engines build great power that carries to red line. The combination of affordability, reliability, and outstanding performance makes this a great engine package.
Kits Include:
+4mm Crank, 11:1 102mm Piston, Cylinder Bore and Hone, Hot Cam, Complete Head Porting and Modifications, SS valves, Heavy Duty valve springs, valve stem seals, and Complete Gasket Kit.
(Parts only kits will require customer to send in their stock head, and cylinder for modification)
This is the most popular engine kit for the 660 raptor because it offers the best bang for the buck. The main reason this is the choice of many is because the stock rod isn't strong enough to hold up to high horse power engines. When you upgrade to a heavy duty rod the cost is almost as high as installing a +4mm crank. This means for roughly the same price as a rod installation you can have a brand new +4mm crank that is trued, welded, and it already has a stronger rod! 