Nitro-Carb Steel Rocker Arms Rockers have 3 to 5 times more resistance to breakage than stock rockers and eliminate pushrod cup and fulcrum failure. Accurate rocker ratios and long slot design make them ideal for use with high lift camshafts. Part No. Description
Gold Race Extruded Roller Rocker Arms Aluminum roller rocker arms are made from extruded billet aluminum for maximum strength. Needle bearing fulcrums and roller tips reduce friction and oil temperature while increasing RPM and horsepower. Sold in sets of 16.
Stud Dia.
Part No.
Description
Ratio
Ratio Stud Dia.
Small Block Chevy 265-400 CRN11750-16 I
CRN10800C-16* CRN11801C-16 † CRN11802C-16 †
SB Chevy 305-350, 1988-99 SB Chevy 262-400, 1955-87 SB Chevy 262-400, 1955-87
1.5 1.5 1.6
3/8" 3/8"
1955-87, Non-Self Aligning, Stock Ratio/Stud Dia. 1955-87, Non-Self Aligning, Stock Ratio 1955-87, Non-Self Aligning, Std. Stud Dia.
1.5 3/8" 1.5 7/16" 1.6 3/8" 1.6 7/16"
CRN11752-16 I CRN11759-16 I CRN11755-16 I
3/8" † Non-self aligning rocker arms must be used with pushrod guideplates. * For self-aligning applications only. Not for use with pushrod guide plates, or with cylinder head casting that guides the pushrod, as severe pushrod wear will occur. Not for LS series engines.
1955-87, Non-Self Aligning 1955-87 Non-Self Aligning, Stock Ratio/Enlarged Stud 1955-87, Non-Self Aligning, Increased Ratio/Enlarged Stud
CRN11771-16
1.5 7/16"
1.6 7/16"
CRN11772-16 L
Ductile Iron Adjustable Rocker Arms Much stronger than original equip- ment. Ideal in shaft mounted applica- tions where valve lash or lifter pre-load adjustment is necessary. Pushrods with cup on end to fit adjusting screw must be used. Part No. Description
1988-99, Non-Self Aligning, Center Bolt Valve Covers
1.5 3/8"
CRN10750-16 I
1988-99, Non-Self Aligning, Center Bolt Valve Covers
1.6 3/8"
CRN10759-16 I
1988-99, Self Aligning, Center Bolt Valve Covers 1.5 3/8" 1988-99, Self Aligning, Center Bolt Valve Covers 1.6 3/8"
CRN10751-16 F CRN10758-16 F
Big Block Chevy 396-454 CRN13750-16 A
1965-90, Stock Ratio, Std. Stud Dia. 1965-90, “Wide Body” Severe Usage, Stock Ratio, Std. Stud 1965-90, Increased Ratio, Std. Stud Dia.
1.7 7/16"
Ratio
1.7 7/16"
CRN13763TR-16 A
CRN64770-16 CRN64771-16 BB Chrysler 350-440 “B”, 1958-78, Std. Ratio BB Chrysler 350-440 “B”, 1958-78, Increased Ratio 1.6 CRN69770-16 SB Chrysler 273-360 “LA”, 1964-91, Std. Cyl. Heads Only 1.5 CRN69771-16 SB Chrysler 273-360 “LA”, 1964-91, Std. Cyl. Heads Only 1.6 1.5
1.8 7/16"
CRN13755-16 A
Small Block Chrysler 318-360 CRN11759-16 H Small Block Ford 221-351W CRN36750-16 C
1992-00 “Magnum” 318 (5.2L) And 360 (5.9L)
1.6 3/8"
1962-00, Stock Ratio, Std. Stud Dia.
1.6 3/8" 1.7 7/16" 1.6 7/16"
1962-00, Increased Ratio, Enlarged Stud Dia. 1962-00, Stock Ratio, Enlarged Stud Dia.
CRN36757-16 E CRN86757-16 A
Ford 351C, 351M-400 CRN27750-16 J
1969-82, Stock Ratio, Std. “Boss” Stud Dia.
1.73 7/16"
Energizer Rocker Arms Die formed aluminum bodies fitted with needle bearing fulcrums and roller tips.
1969-82, Stock Ratio, Std. “Boss” Stud Dia., “Wide Body”
1.73 7/16"
CRN27771-16 A
Big Block Ford 429-460 CRN27750-16 G
1968-97, Stock Ratio, Std. “Cobra Jet” Stud Dia.
1.73 7/16"
Stud Dia.
Pontiac 265-455 CRN28758-16 B
Part No.
Description
Ratio
1955-81, Increased Ratio For 7/16" Straight Studs 1.6 7/16" A: 1991-up Gen. V and VI engines require CRN99152-16 7/16" rocker arm studs and pushrod guideplates. B: Must machine cyl. heads and install CRN99157-16 7/16" rocker arm studs. C: Must machine 1966-00 cyl. heads and install CRN99156-16 3/8" rocker arm studs and CRN36650-1 pushrod guideplates or use CRN36655-16 conversion kit on 1977-00 pedestal mount cyl. heads. E: Must machine 1966-00 cyl. heads and install CRN99157-16 7/16" rocker arm studs and CRN36650-1 pushrod guideplates. Heat treated pushrods required. F: For use in self-aligning applications. Do not use with pushrod guide- plates or with cyl. heads that guide the pushrods, as severe pushrod wear will result. Not for use in LS1 type engines. G: 1968-71 engine using bottleneck studs require CRN99159-16 straight 7/16" studs to allow valve adjustment, while 1972-97 engines can use CRN35655-16 conversion kit for 3/8" pushrods. H: Must use CRN36655-16 rocker arm stud conversion kit and CRN36668- 16 or CRN36621-16 pushrods. Stock valve covers must also be replaced or modified for clearance. I: 1988-99 engines with self-aligning rocker arms require pushrod guide- plates, CRN99160-16 rocker studs and appropriate heat treated pushrods. J: Engines using pedestal mount rocker arms require CRN52655-16 con- version kit for street applications. K: Includes studs, guideplates and pushrods. L: Clears 1.630" OD springs, “wide body” for severe usage.
CRN11744-16 L CRN11745-16 L
SB Chevy 262-400, 1955-87 SB Chevy 262-400, 1955-87
1.5 3/8" 1.5 7/16"
SB Chevy 262-400/ 1962-00 SB Ford 221-351W, 1955-87 SB Chevy 262-400/ 1962-00 SB Ford 221-351W, 1955-87 BB Chevy 396-454/ 1968-97 BB Ford 429-460, 1965-90
CRN11746-16 L
1.6 3/8"
CRN11747-16 L
1.6 7/16"
CRN13744-16 M
1.7 7/16"
Pontiac 265-455, 1955-81
1.65 7/16"
CRN28747-16 N
CRN44746-16 SB Ford 221-351W, 1977-00, Pedestal Mount 1.7 5/16" L: 1988-99 engines with self-aligning rocker arms require the installa- tion of pushrod guideplates and appropriate heat treated pushrods. Valve cover clearance must be checked. M: 1991 and later Gen. V and VI engines require the installation of CRN99152-16 7/16" rocker studs and factory pushrod guideplates (under 480 PSI open seat pressure), or CRN99157-16 7/16" rocker studs and CRN13650-1 pushrod guideplates (over 480 PSI open seat pressure). N: Engines not equipped with 7/16" rocker studs require cyl. head machining and CRN99157-16 rocker studs.
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