Product Description
Michigan Motorsports LS1 Rocker Arms w/ Upgraded Trunnion Bearings Installed
Fits 1999-2013 4.8L 5.3L 5.7L Cathedral Port LS Engines and 1999-2006 6.0L Engines.
Upgrade your LS valvetrain with Michigan Motorsports’ LS1 rocker arms, professionally assembled with premium trunnion bearings for unmatched durability and performance. Designed to replace the failure-prone stock needle bearings, this complete set is ideal for both stock rebuilds and high-performance heads-and-cam builds. Each rocker arm comes ready to install with the trunnion upgrade already in place, ensuring reduced friction, improved reliability, and peace of mind for your LS engine.
Fitment
- LS1, LS2, LS6, LR4, LM7, L59, LQ4, LQ9, LM4, L33, LS4, LY2, L20, LY5, LMG, LMF, LH6, LC9, LH8, LH9
- Also fits LS1/LS2/LS6/LR4 Vortec 5300 LM7 L59 LM4 L33 engines
- Compatible with 4.8L, 5.3L, 5.7L, and 6.0L LS-based engines (only 1999-2006 on 6.0L engines)
- Will not fit: Rectangle port "LS3" style cylinder heads
Kit Includes
- (16) LS Series rocker arms with roller bearing trunnion upgrade installed
- (16) High-strength Allen head bolts for rocker arm installation
Why Upgrade?
- Prevents common failures: Replaces OEM cageless needle bearings that can fail and scatter metal debris through the engine.
- Premium materials: 8620 steel alloy trunnion with caged roller bearings for improved longevity.
- Performance-ready: A must-have for aggressive camshaft and cylinder head upgrades.
- Ready to install: Rockers arrive fully assembled with the trunnion kit installed—no extra work required.
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Product Reviews
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LS rockers
I could not rebuild my own rockers for the price of these! great value.
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Rocker arms
Great quality fast shipping
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LS rocker arms
Received in good shape, upgraded trunions as advertised.
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Easy to install and high quality, would definitely recommend for the price
High quality
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LS1 ROCKER ARMS WITH UPGRADED TRUNIONS
Excellent rocker arm kit. Look and feel very solid. Peace of mind when assembling the build
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Ls1 upgraded rocker arms
Great quality product
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LS1 Rocker arms
Perfect fit, easy install, quality product!
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Great value
Affordable and dependable
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New rockers replacing OEM 5.3L TM7 WITH 322k miles
Orignal miles 322k, 2001 Silverado Z71, replaced Cruz the old ones were ok but needed needed to be replaced!! No failures on oem stuff, just a lot of road miles to South Texas ! Best replacement rocker arm for the old, still runs hard 5.3l. Replaced 4l60e @ 197k, Get these better than OEM STOCK STEEL PINIONS! Maybe I'll get another 322k + on these!
