Comp Cams Small Block Chrysler 273-360 287T H-7 Mutha Thumpr Hyd. Flat Tappet Tire-Rite AEM Banner

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If the spring load setting is too low

1985 DODGE RAM 50 PICKUP ROYAL

1987 Chevrolet Astro CL 4

Comp Cams Small Block Chrysler 273-360 287T H-7 Mutha Thumpr Hyd. Flat Tappet Tire-Rite AEM BannerSmall Block Chrysler 273 360 287T H 7 Mutha Thumpr" Hyd. Flat Tappet Cam & Lifter Kit Thumpr" Camshafts are a new series of retro fit hydraulic roller and hydraulic flat tappet cams designed for use in Small & Big Block Chevy, Ford 351 Windsor and Small Block Chrysler engines. The aggressive exhaust note of a Thumpr" cams comes from a combination of early exhaust valve opening, long exhaust duration and a generous amount of intake and exhaust overlap