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Trunnion-mount rocker arms are stronger, stiffer, and lower-friction than traditional ball-and-stud rockers—they’re one of the many things that make GM’s...
Trunnion-mount rocker arms are stronger, stiffer, and lower-friction than traditional ball-and-stud rockers—they’re one of the many things that make GM’s LS engines a popular choice for high-performance builds. So, why would you want to install a rocker arm trunnion upgrade kit? Well, the factory setup isn’t bulletproof. Even on stock engines, it’s common to find needle bearing rollers in the oil pan. When you install an aggressive camshaft and stiffer valve springs, it only makes sense to consider replacing your rocker arm fulcrums, as well.
Fortunately, the experts at Summit Racing Equipment...
Trunnion-mount rocker arms are stronger, stiffer, and lower-friction than traditional ball-and-stud rockers—they’re one of the many things that make GM’s LS engines a popular choice for high-performance builds. So, why would you want to install a rocker arm trunnion upgrade kit? Well, the factory setup isn’t bulletproof. Even on stock engines, it’s common to find needle bearing rollers in the oil pan. When you install an aggressive camshaft and stiffer valve springs, it only makes sense to consider replacing your rocker arm fulcrums, as well.
Fortunately, the experts at Summit Racing Equipment have responded, offering rocker arm trunnion upgrade kits for Chevy’s Gen III/IV LS and Gen V LT engines, as well as the 5.9L 24-valve Cummins diesel. They’re easy to install, too; with the rocker arms removed and proper tools on-hand, you can perform the conversion in a couple of hours.
Kits are available in two different styles:
Which is right for your build? Needle bearings may create less friction, for greater power and efficiency. Bronze bushings have fewer parts to fail, and may perform better under heavy loads. Either one is an improvement over the stock parts, especially in a performance application. It really comes down to personal preference.
All trunnion kits include new bearings or bushings, retaining rings (except in Cummins applications), and trunnions. Kits may also include mounting bolts and a removal/installation tool —see item descriptions for more information.
Gen. 3/4 Chevy LS Rocker Arm Trunnion Upgrade Kit, Bronze Bushing, Retrofit, Rectangle and Cathedral Port Rockers, Set of 16
Part Number: SUM-141560
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
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Rocker Arm Trunnion Upgrade Kit, Trunnion Upgrade, Chevy, LS, Set of 16
Part Number: SME-143002
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Rocker Arm Trunnion Upgrade Kit, Needle Bearing, Chevy, LS, Kit
Part Number: BTC-TK002NB
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Rocker Arm Trunnion Upgrade Kit, Needle Bearing Style, Chevy, Small Block LS, Kit
Part Number: BTC-BTRTK001
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Rocker Arm Trunnion Upgrade Kit, Upgrade, GM, Gen. 3/4 LS Cathedral or Rectangle Port Rockers, Set of 16
Part Number: CCA-13702-KIT
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Rocker Arm Trunnion Upgrade Kit, Needle Bearing, Roller Fulcrum, Chevrolet, 5.3L/6.2L/6.6L Gen V, 7.0L LS, Kit
Part Number: BTC-TK027
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Rocker Arm Trunnion Upgrade Kit, Trunnion Upgrade, Includes Installation Tool, Buick, Cadilac, Chevy, GMC, LS, Kit
Part Number: CCA-13702TL-KIT
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Rocker Arm Trunnion Upgrade Kit, Bronze Bushing, Chevy, Small Block LS, Set of 16
Part Number: PQX-1213642
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Rocker Arm Trunnion Upgrade Kit, Needle Bearing Style, Chevy, Small Block LS, Set of 16
Part Number: PQX-1213462
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Rocker Arm Trunnion Upgrade Kit, Silicone Bronze Bushings, Chevy, Small Block LS, Kit
Part Number: PQX-1213644
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Trunnion Upgrade Kit for GM LS7 and Gen V LT1, Set of 16
Part Number: CCA-13704-KIT
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Rocker Arm Trunnion Upgrade Kit, Needle Bearing, GM, LS1/LS3/LS7, Set of 16
Part Number: TFS-30700500
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Rocker Arm Trunnion Upgrade Kits, Needle Bearing Style, Trunnions, Bearings, Clips, For Stock LS7, Gen V LT1/LT4 Rocker Arms, KIt
Part Number: BTC-BTRTK007
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Trunnion Upgrade for GM LS7 and GEN V LT1 w/ Disassembly Tool, Kit
Part Number: CCA-13704TL-KIT
Not Yet Reviewed
Estimated Ship Date: Jun 13, 2025 if ordered today
Estimated Ship Date: Jun 13, 2025 if ordered today
Rocker Arm Trunnion Upgrade Kit, Bronze Bushing, Dodge, Cummins, 5.9L, 24 Valve, Kit
Part Number: SUM-141570
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Rocker Arm Fulcrum Upgrade Kit, Bronze Bushing, Dodge, Cummins, 5.9L/6.4L 24 Valve, Set of 12
Part Number: PQX-9540810
Not Yet Reviewed
Estimated Ship Date: Jun 2, 2025 if ordered today
Estimated Ship Date: Jun 2, 2025 if ordered today
SMITH BROS TRUNNION BUSHING
Part Number: BTC-LSTB
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Rocker Arm Trunnion Upgd Kit, Fulcrum Upgd Kit, Rplmt Fulcrum Bearings & Comp for 16 Rocker Arms, Incl. Removal & Install. Tool & Washers
Part Number: PQX-1213464
Not Yet Reviewed
Estimated Ship Date: May 28, 2025 if ordered today
Estimated Ship Date: May 28, 2025 if ordered today
Rocker Arm Trunnion Upgrade Kit, 0.005 in. Oversize Bronze Bushing, Dodge, Cummins, 5.9L, 24 Valve, Kit
Part Number: SUM-141570-OS
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Trunnion Upgrade , Trunnion-Upgraded 1.7 Ratio Rocker Arm for GM LS1
Part Number: CCA-1477-1
Not Yet Reviewed
Estimated Ship Date: Jun 13, 2025 if ordered today
Estimated Ship Date: Jun 13, 2025 if ordered today
Rocker Arm Fulcrum Upgrade Kit, Bronze Bushing, Dodge, Cummins, 5.9L/6.4L 24 Valve, Each
Part Number: PQX-9540801
Not Yet Reviewed
Estimated Ship Date: Jun 2, 2025 if ordered today
Estimated Ship Date: Jun 2, 2025 if ordered today
CUMMINS TRUNION 8620 .866D/1.556L .325HO
Part Number: TPD-TPTRUN
Not Yet Reviewed
Estimated Ship Date: Apr 28, 2025 if ordered today
Estimated Ship Date: Apr 28, 2025 if ordered today
TP1 CUMMINS TRUNION COATED
Part Number: TPD-TP1TRUN
Not Yet Reviewed
Estimated Ship Date: Apr 28, 2025 if ordered today
Estimated Ship Date: Apr 28, 2025 if ordered today
Trunnion Upgraded 1.8 Ratio OE Rocker for GM GEN V LT1
Part Number: CCA-1480-1
Not Yet Reviewed
Estimated Ship Date: Jun 9, 2025 if ordered today
Estimated Ship Date: Jun 9, 2025 if ordered today
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Summit Racing™ LS Series Retrofit Trunnion Kits SME-143002
