Speedmaster, Billet Steel, Main Cap, Pontiac 455, 2 to 4-Bolt (Straight), Set of 3 |
| Item Number: SPM289-1013 |
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| Precision CNC-machined from superior-quality 1025 billet steel. They come available as stock replacements (straight bolt) or with splayed outer bolt holes. The splayed caps feature 10 degree angled outer holes to positively reinfoce and tie the block together. Improves reliability in highly stressed engines by reducing distorion of the main bearing bores, and increasing the cap's resistance to closing up under high loads. Note: Align boring and honing are required after installation. |
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