Since 1952
America's Oldest Speed Shop ®
Speedway Motors Bill Smith
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Summers Brothers Gear Drive
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Designed for S/B Chevy, this drive uses Torrington needle bearings for rear and forward thrust control. B/B Chevy also uses forward and rear thrust bearings. All drives fit under stock timing chain covers.
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    Ron Shaver and Bob Westphal have combined their 70+ years experience in the sprint engine building business to create the ultimate gear drive.

    • Made of ultra-light aluminum aircraft alloy
    • Crack resistant steel idler gear support
    • Gears precision cut from 9310 steel, with no more than a .001 total run out with 20 degrees pressure angle
    • Fits most small block Chevys
    • Highly adjustable and easy to install