Specifications
- Brand
- ARP
- Part #
- 190-3608
- UPC
- 672036019457
ARP 1964-Earlier 326-421 cid w/ D-Port Head Bolt Kit
$126.63
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ARP head bolt kit for Pontiac 326-421 cid engines with D-Port heads. Ensures a strong, reliable seal for your cylinder heads.
Key Features
- Stronger than stock fasteners — made from heat-treated 8740 chromoly steel with a tensile strength of 200,000 psi.
- Black oxide finish — resists rust and corrosion for a longer service life.
- Includes hardened parallel ground washers — ensures even load distribution on the cylinder head.
- Designed for Pontiac 326-421 cid engines with D-Port heads.
- Comes with detailed installation instructions.
This kit is designed for Pontiac 326, 350, 389, 400, and 421 cid engines equipped with D-Port cylinder heads. It is compatible with applications from 1964 and earlier.
⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more
Specifications
- Brand
- ARP
- Manufacturer Part #
- 190-3608
- UPC
- 672036019457
Frequently Asked Questions
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ARP 1964-Earlier 326-421 cid w/ D-Port Head Bolt Kit
$126.63