FelPro ES72173 Head Bolt Set (2 Sets Req.) for 1997-2003 Chevrolet GM LS 4.8, 5.3, 5.7, 6.0LHead Bolt Set Cylinder Head Bolt Kit Hex Head Steel Natural GM LS Series Kit

Good Low and Mid Range Torque in the 2400-3200 RPM Range

heat treated steel plates

Increased exhaust velocity adds power

and a fully illustrated instruction manual ensure that WirelessAIR(TM) App Only

000 psi--15 percent stronger than Grade 8 fasteners

The switch enables on the fly adjustment between the 6 levels so you can turn it up whenever the mood strikes

self-tapping mounting screws

Notes: Fits LB7

Method MR304 Double Standard 20x10 -18mm Offset 6x5

and 15' stainless steel braided line / 4AN fittings required for install

-16 bolts for LS trunnion kit

15 to 30 horsepower increase over stock rocker arms