Up to 750+ highly affordable horsepower from a brand new GM block with top-shelf components. From the master engine builders at Katech. This engine includes: New production LS7 block 58x Callies forged crankshaft – 4-inch stroke Callies forged connecting rods CP forged 4.125" pistons/rings/pins 11.2:1 Compression ratio with a stock LS7 chamber Clevite main & rod bearings Block oil/coolant plugs included *valley cover and rear cover sold separately Higher compression ratios available upon request
