WISECO 2618 ALLOY FORGED PISTON SET FOR 4.125 BORE TO FIT ANY LS 9.200-9.250 DEK HEIGHT BLOCK WITH ANY STYLE LS HEAD WITH 4.000 STROKE AND 6.098-6.125 LONG ROD.

THIS IS FLAT TOP PISTONS WITH VALVE RELIEFS FOR HIGH LIFT CAMSHAFTS AND IS DESIGNED WITH THICKER RING LAND AND CROWN THICKNESS FOR POWER ADDERS SUCH AS BOOST AND/OR NITROUS.  BUT ALSO A GOOD PISTON FOR NATURALLY ASPIRATED ENGINE WITHOUT POWER ADDERS.

GAS NITRIDED STAINLESS TOP RING SET IS INCLUDED THAT WILL HANDLE 20+ PSI BOOST AND HEAVIER AMOUNTS OF NITROUS.

NOTE: STANDARD .150 WALL WRIST PIN SHOULD BE UPGRADED FOR MODERATE TO HEAVY BOOST & OR NITROUS. OR, FOR ANY AMOUNT OF POWER ADDER IF YOU WANT TO BE CAUTIOUS.  CONACT THE ZL1 SPEED SHOP ARE ADD NOTE AT CHECKOUT THAT YOU WOULD LIKE THE $125 WRIST PIN UPGRADE TO BRING PIN RATING UP TO 1500HP RANGE FROM 700HP RANGE. WE ALSO HAVE A PIN UPGRADE FOR $250 THAT WILL HANDLE 2000+HP!

* AT 4.125 BORE THIS PISTON WILL HAVE APPROXIMATELY .004 PISTON TO WALL CLEARANCE. FOR MODERATE TO HEAVY BOOST AND OR NITROUS .005-.008 PISTON TO CYLINDER WALL CLEARANCE IS ADVISED.  FOR $75.00 ADDIONAL FEE, WE CAN HAVE THE PISTONS MADE WITH SMALLER CUSTOM OUTSIDE DIAMETER FOR EXTRA PISTON TO WALL CLEARANCE. CONTACT US FOR MORE INFORMATION.