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Part fits the following years: 1962, 1963, 1964

Grand Prix Cylinder Head Bolts 326-421 (w/D-Port Heads Only), by ARP

Part# G221343

Mfg# 190-3608

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SAVE: $8.96 Retail: $94.95

OPGI Price: $85.99

Brand: ARP
Part Type: (P) High Performance, designed to improve performance
Years: Sold As: SET
2015 Grand Prix Catalog Page: 223
2016 Grand Prix Catalog Page: 231


Maximum clamping force

  • NOTES
  • NOTE1: These high-performance items are not eligible for any further discounts or promotional pricing.

All ARP cylinder head bolt sets are hex head.

Make & ModelYear RangeApplication Details
Pontiac LeMans1961-1964 326-421 (w/D-Port Head Only)
Pontiac Tempest1961-1964 326-421 (w/D-Port Head Only)
Pontiac Grand Prix1959-1964 326-421 (w/D-Port Heads Only)
Pontiac Catalina1959-1964 326-421 (w/D-Port Heads Only)
Pontiac Bonneville1959-1964 326-421 (w/D-Port Heads Only)
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