The LS7 is a 7,011 cc (7.011 L; 427.8 cu in) engine, based on the Gen IV architecture. The block is changed, with sleeved cylinders and a larger 4.125 in (104.8 mm) bore and longer 4.00 in (101.6 mm) stroke than the LS2. The small-block's 4.4 in (111.8 mm) bore spacing is retained, requiring pressed-in cylinder liners. The crankshaft and main bearing caps are forged steel for durability, the connecting rods are forged titanium, and the pistons are hypereutectic. The two-valve arrangement is retained, though the titanium intake valves by Del West have grown to 2.20 in (55.9 mm) and sodium-filled exhaust valves are up to 1.61 in (40.9 mm).

This kit includes a re programmed  factory ECU with all vehicle anti theft removed, & Harness drive by wire throttle body.  Includes  fuse block, electric fan controls, relays for electric fans & fuel pump.  Harness is 5 wire hook up to chassis (12v+,ignition, tach, fuel pump , electric fan +)  this system requires the use of 2 o2sensors and MAF sensor included this kit. Drive by wire pedal is also included.