ARP 8740 1/2" Head Stud Kit - 2003+ LS 427 LS This package is still dependable

This package is still dependable at the 1000HP mark if you want to put a little extra squeeze on it with your choice of power adder

Exclusive high performance porting programs via 5-Axis CNC – Intake/Exhaust/Chambers

0L blocks open up more options for better flowing cylinder heads

The 558-416 is an adapter harness that can be used to adapt any LS harness that uses an LS1/2 MAP sensor connection to an LS3 MAP

Need a stronger fastener

ARP 8740 1/2" Head Stud Kit - 2003+ LS 427 LS This package is still dependableBoostline Performance in combination with ARP Fasteners has put together an affordable 1 2" head stud set for 03+ Gen III and Gen IV LS engines! These 1 2" Studs are made from ARP 8740 material, adding additional clamping force and head gasket stability for boosted applications on stock blocks. Any Boostline Engine package can be drilled and tapped for this 1 2"stud option! Or you can do it yourself by drilling tapping Tick Performance drilling