Pushrod Length Checker COM7901-1 Determine correct pushrod length quickly and easily when building race engines. Made from a thin wall 5/16" pushrod that is cut and threaded. Checker has 5/16" ball on each end and extends from 7.5" to 8.7".
High Energy Die-Cast Aluminum Roller Rocker Arms Affordable rocker arms have die-cast aluminum
bodies. Needle-bearing fulcrums and roller bearings reduce friction and decrease oil temperature. Sold in sets of 16. Part No. Description Rocker Stud Rocker Ratio COM17001-16 SB Chevy 265-400 3/8" 1.5 COM17002-16 SB Chevy 265-400 3/8" 1.6 COM17004-16 SB Chevy 265-400 7/16" 1.5 COM17005-16 SB Chevy 265-400 7/16" 1.6 COM17043-16 SB Ford 289-351W 3/8" 1.6 COM17044-16 SB Ford 289-351W 7/16" 1.6
Pushrod Guide Plates A must for the high lift and spring pressure of performance engines, guide plates are designed using a
stereolithographic process for ultimate ¿W([DFWVWXGSODFHPHQWDQGURXQGHG contact points are two outstanding features of the black-oxidized guide plates. Sold in sets of 8. Part No. Description Type Pushrod Size COM4800-8 SB Chevy 265-400 Raised 5/16" COM4808-8 SB Chevy 265-400 Flat 5/16" COM4810-8 SB Chevy 265-400 Flat 3/8" COM4816-8 SB Ford 289-351W Flat 5/16" Adjustable Pushrod Guide Plates
Ultra-Gold Aluminum Roller Rocker Arms
Rigid CNC-machined aluminum roller rockers SURYLGHVXI¿FLHQWFOHDUDQFHIRU2'YDOYH springs and can withstand extremely high spring pres- sures and lifts. Sold in sets of 16. Part No. Description
Rocker Stud Rocker Ratio
COM19001-16 A COM19002-16 A COM19004-16 A,B COM19005-16 A,B COM19043-16 COM19044-16 B COM19045-16
SB Chevy 265-400 SB Chevy 265-400 SB Chevy 265-400 SB Chevy 265-400 SB Ford 289-351W SB Ford 289-351W
3/8" 3/8"
1.5 1.6 1.5 1.6 1.6 1.6
7/16" 7/16" 7/16" 7/16" 3/8"
Often required when cylinder heads have relocated intake ports, guide plates may be ZHOGHGDIWHU¿QDODGMXVWPHQWV6ROGLQVHWV of eight. Part No. Description Type
Ford 351C
1.73
A: Will not replace late model rail rocker. B: Must use screw-in studs and guide plates.
Pushrod Size
Stud Dia.
COM4835-8 SB Chevy/SB Ford, 2-Pc. COM4839-8 SB Chevy 265-400
Flat Flat
5/16"
7/16" 7/16"
3/8"
Ultra Pro Magnum Roller Rocker Arms Ultra Pro Magnum's rigid, web-like design reduces
High Energy Rocker Arms Ideal for oval track racing classes requiring 2(0W\SHVWDPSHGVWHHOURFNHUDUPV6ROGLQ VHWVRIZLWKDGMXVWLQJQXWVDQGSLYRWEDOOVZKHQUHTXLUHG Part No. Description Rocker Stud Rocker Ratio COM1212-16 SB Chevy 265-400 3/8" 1.5 COM1217-16* SB Chevy 265-400 3/8" 1.5 COM1218-16 SB Chevy 265-400 3/8" 1.6 COM1220-16 SB Chevy 265-400 7/16" 1.5 COM1270-8 Ford 2300cc 4-Cyl. OHC N/A * Nitrided for added strength
PRPHQWRILQHUWLD0DGHRIFKURPHPRO\DQG¿QLVKHGLQ black oxide, rocker arms have oversized trunnions, sorted nee- dle bearings, and hardened roller tips. Sold in sets of 16. Part No. Description Rocker Stud Rocker Ratio COM1601-16 SB Chevy 265-400 3/8" 1.52 COM1602-16 SB Chevy 265-400 3/8" 1.6 COM1604-16 SB Chevy 265-400 7/16" 1.52 COM1605-16 SB Chevy 265-400 7/16" 1.6 COM1617-16 SB Chevy 305-350, 1988-Up Self-Aligning Rockers 3/8" 1.52 COM1618-16 SB Chevy 305-350, 1988-Up Self-Aligning Rockers 3/8" 1.6 COM1631-16 SB Ford 289-351W 3/8" 1.6 COM1632-16 SB Ford 289-351W 7/16" 1.6 Ultra Pro Magnum XD Roller Rocker Arms durability. Rocker arms are made of 8650 steel with super accu- rate ratios, billet pushrod seat inserts, precision-sorted needle bearings, and hardened roller tips. Compatible with most diame- ter valve springs and retainers. Covered by a lifetime guarantee against breakage. Sold in sets of 16. Part No. Description Rocker Stud Rocker Ratio COM1801-16 SB Chevy 265-400 3/8" 1.5 COM1804-16 SB Chevy 265-400 7/16" 1.5 COM1805-16 SB Chevy 265-400 7/16" 1.6 COM1832-16 SB Ford 289-351W 7/16" 1.6 The next design in the evolution of steel stud mount rocker arms, Ultra Pro Magnum XD rock- ers offer increased strength and unsurpassed
Magnum Roller Rocker Arms Magnum roller rockers have a low-fric- tion roller tip to reduce valve tip and guide wear. The stiffer cross section SUHYHQWV³ÀH[´DQGLQFUHDVHVYDOYHOLIW (good for 15-30 more horsepower). Sold LQVHWVRIZLWKDGMXVWLQJQXWV Part No. Description
Rocker Stud Rocker Ratio
COM1412-16 COM1416-16 A COM1417-16 B COM1418-16 B COM1431-16 C COM1442-16 D
SB Chevy 265-400 SB Chevy 265-400 SB Chevy 265-400 SB Chevy 265-400
3/8" 3/8" 3/8" 3/8"
1.52
1.6
1.52
1.6 1.6 1.6
Ford 289-351W Rail Type, 1968-89 3/8" Ford 289-351W Non-Rail, 1961-67 3/8"
A: May require cylinder head machine work. B: For use on 1987-up self-aligning. C: For 1978-up use COM4504-16. D: Can be used with guide plates
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2019-20 CIRCLE TRACK PARTS AND ACCESSORIES
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