The ARP 146-3603 is a High Performance Series cylinder head bolt kit for Jeep Inline-6 232/258 engines fitted with a 4.0L cylinder head. Bolts use a hex head design, machined from chromoly steel with a black oxide finish.
Specifications:
- High Performance Series
- Hex head
- Chromoly steel construction
- Black oxide finish
Applications:
- Jeep Inline-6 232/258 cid engines with 4.0L head
FAQ
What head style do the ARP 146-3603 head bolts use?
They use a hex head design.
What material and finish are these bolts?
Chromoly steel with a black oxide finish.
Which engines does this kit fit?
Jeep Inline-6 232/258 cid engines fitted with a 4.0L cylinder head.
How does this differ from the 146-3601 and 146-3602 kits?
It is specifically for a 232/258 block fitted with the 4.0L head, combining elements of both applications.

