Main Caps

Speedmaster™ billet main caps are 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 reinforce and tie the block together. These extreme main cap sets consist of the center three caps. Speedmaster™ billet main caps improve reliability in highly stressed engines by reducing distortion of the main bearing bores, and increasing the cap’s resistance to closing up under high loads. Line boring is required after fitting to the engine.

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$310.10$59.60

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Mopar Chrysler BB 440 OEM 2 Bolt Replacement Billet Steel Main Caps
US $108.50 US $155.00
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Ford 429 460 OEM 2 Bolt to 4 Bolt Splayed Billet Steel Main Caps (Middle 3 Caps)
US $105.80 US $151.10
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Ford 351W Windsor OEM 2 Bolt to 4 Bolt Splayed Billet Steel Main Caps
US $73.60 US $105.10
2 Reviews
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Ford SB 289 302 Windsor OEM 2 Bolt Replacement Billet Steel Main Caps
US $88.80 US $127.00
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Chevy BBC 454 OEM 4 Bolt Replacement Billet Steel Main Caps
US $132.30 US $189.00
7 Reviews
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