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Big Block 427 Anniversary
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GM PARTS CATALOG


GM PUSHRODS

GM Performance Parts offers a complete line of heavy-duty pushrods for most GM engines. They are designed to deliver outstanding performance in street and competition applications and are available in two materials: mild steel, which is suitable for high-performance street cars, power boats, street rods, and limited competition applications, and 4130 chromemoly steel, for maximum-performance racing engines.

Heavy-duty pushrods for big-block V-8 engines are available in standard and extended lengths. Longer pushrods can be used to restore the correct valvetrain geometry when using a high-lift camshaft with a small base circle diameter. Extra-long pushrods also are recommended when valves with longer-than-stock stems are installed. GM Performance Parts pushrods are case-hardened for use with pushrod guide plates. Pushrods are available for flat tappet, hydraulic roller, and mechanical roller applications. Look under “usage” in charbelow to verify proper application before ordering

Premium_Intake_Pushrod  Intake_Pushrod_Roller_Lifter_Style

GM BIG-BLOCK PUSHRODS
* Requires use of guideplate P/N 3879620

Part Number Material Diameter Length Useage Port Description
10134307
1010 steel 3/8" 8.285" Flat tappet Intake (8) heavy-duty heat-treated .075" wall, hardened tip inserts. +.100 long. Use 366277 for single piece.
10134308 1010 steel 3/8" 9.256" Flat tappet Exhaust (1) heavy-duty heat-treated .075" wall, hardened tip inserts. +.100 long
10134304 1010 steel 7/16" 8.285" Flat tappet Intake (8) heavy-duty heat-treated .075" wall, hardened tip inserts. Standard length. Use 14044874 for single piece.
10134303 1010 steel 7/16" * 9.256" Flat tappet Exhaust (1) heavy-duty heat-treated .075" wall, hardened tip inserts. Standard length.
10134306 4130 steel 7/16" * 8.285" Flat tappet Intake (1) heavy-duty heat-treated .060" wall, standard length. For use in early ZZ-series engines with guide plates
10134305 4130 steel 7/16" * 9.256" Flat tappet Exhaust (8) heavy-duty .060" wall, standard length. For use in 2nd design ZZ-series engines without guide plates. Use 10241740 for single piece.
14097068 1010 steel 3/8" 8.171" Flat tappet Intake (1) heavy-duty .060" wall, standard length. For use in 2nd design ZZ-series engines without guide plates.
14097070 1010 steel 3/8" 9.151" Flat tappet Exhaust (1) Chromemoly 1-piece design racing pushrod
10227762 1010 steel 3/8" 7.592" Hyd. roller Intake (1) heavy-duty heat-treated .060" for use in Gen VI 454 and 502 engines with hydraulic roller lifters
10227763 1010 steel 3/8" 8.569" Hyd. roller Exhaust (1) heavy-duty heat-treated .060" for use in Gen VI 454 and 502 engines with hydraulic roller lifters
12368081 1010 steel 3/8" 7.592"– 8.569" Hyd. roller — Kit of (8) P/N 10227762 and (8) P/N 10227763
88961559 4130 steel 3/8" 7.900" Hyd. roller Intake Chromemoly 1-piece for 572/620 (Tall Deck Block)
88961558 4130 steel 3/8" 8.900" Hyd. roller Exhaust Chromemoly 1-piece for 572/620 (Tall Deck Block)
88962284 4130 steel 3/8" 8.550 Mech. roller Intake Chromemoly 1-piece for 572/620 (Tall Deck Block)
88962283 4130 steel 3/8" 9.525 Mech. roller Exhaust Chromemoly 1-piece for 572/620 (Tall Deck Block)

GM ROCKER ARM STUDS & ACCESSORIES

A. 3896648Rocker_A_Adjusting_Nut
Rocker Adjusting Nut
Positive locking 7/16-20 nut for all big-block V-8s

B. 12495498Rocker_Arm_Stud_Kit_Engines
Rocker Arm Stud Kit (1960 –1990 Engines)
Strong, 7/16" diameter screw-in studs are built to stand up to stiff valve springs and high-lift camshafts
Suitable for all high-performance and competition applications
Includes 16 pieces. (For single stud usage, use P/N 3921912.)

12495518
Rocker Arm Stud Kit (3/8" x 7/16") (not shown)
Designed for 1991-and-newer Gen V and Gen VI heads when adjustable tappets are desired
Heat-treated, 8720 steel stud has a 3/8-16 thread that screws into the head and a 7/16-20 upper shaft for the rocker arm nut
Use with rocker arm kit P/N 12368085 only. (For single stud usage, use P/N 12368941.)

10114123
Rocker Arm Stud Kit (Gen V Style) (not shown)
Used on the Gen V engines
Holds the “non-adjustable” rocker arms in place

GM GUIDE PLATES

C. 3860038Pushrod_Guide_Plate
Pushrod Guide Plate (3/8")
Designed for all 1960–1990 iron and aluminum cylinder heads with 3/8" diameter pushrods
Slotted style with hardened steel construction aligns rocker arms with valve stem tips on big-block’s splayedvalve head
Eight required for each engine Use with screw-in rocker stud P/N 3921912.

3879620
Pushrod Guide Plate (7/16") (not shown)
Similar to guide plate described above, but for use with heavy-duty 7/16" diameter pushrods

12562369
Pushrod Guide Plate (Gen V 454/502 Style) (not shown)
Used on all Gen V 454 and 502 engines with 3/8" diameter pushrods

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