GM/Holden LS1 V8 4.005" BORE SRP254276. SRP small block Chevy 15 degree LS1/LS2 inverted dome pistons are ideal for naturally aspirated or moderate boost and nitrous street/strip applications. They're forged from 4032 low-expansion, high-silicon aluminum alloy for quieter operation and feature a forged oiling pin for increased wrist pin lubrication. Pin fittings, round wire locks, and a wall wrist pin are included. Their CNC machined ring grooves accept 1.5, 1.5, 3.0mm rings, which are sold separately. Specs: Application: Chev/Holden LS1/LS2/LS6 series V8. C.I.D: 403. Bore (in):4.005 in. Bore (mm):101.727mm. Piston Style:Dish, with a trough. Piston Material:Forged aluminum. Compression Distance (in):1.115 in. Piston Head Volume (cc):+29.00cc. Wrist Pin Style:Press-fit or floating. Pin Diameter (in):0.927 in. Piston Ring Thickness:1.50mm x 1.50mm x 3.00mm. Quantity:Sold individually. Notes:Oil rail support included.Notes: Includes Spiro Lock, Straight Wall Pin
