ARP HEADER BOLT KIT FOR GM GEN 3/4 LS Engines
Choose Your Header Bolt Kit:
- Black Oxide Hex Head, 20mm UHL - ARP 134-1101
- Black Oxide 12-Point Head, 20mm UHL - ARP 134-1201
- Black Oxide Hex Head, 30mm UHL (for 3/8" and thicker aftermarket header flanges) - ARP 134-1102
- Black Oxide 12-Point Head, 30mm UHL (for 3/8" and thicker aftermarket header flanges) - ARP 134-1202
- Stainless Steel Hex Head, 20mm UHL - ARP 434-1101
- Stainless Steel 12-Point Head, 20mm UHL - ARP 434-1201
- Stainless Steel Hex Head, 30mm UHL (for 3/8" and thicker aftermarket header flanges) - ARP 434-1102
- Stainless Steel 12-Point Head, 30mm UHL (for 3/8" and thicker aftermarket header flanges) - ARP 434-1202
20mm length is ideal for 1/4" flange headers or factory manifolds and 30mm length is intended for 3/8" flange headers or larger.
