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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LS1 ROCKER ARMS
Easiest people to deal with. Incredibly fast delivery time! Only two days to Australia.
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ls1 rocker arms
great product. fast shipping
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LS1 ROCKER ARMS WITH UPGRADED TRUNIONS
Nice parts with very fast shipping. Highly recommended!
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Rocker arms good!!!
Good quality very well-built works great
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Rocker arms
These work great! The price is spot on! The only way your beating this price is doing it yourself and as most of us with limited time to work on our projects this saved both time and frustration also giving you the reliability that your looking for!
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Nice Bolts
My kit came with bolts that were high quality made in USA!
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High Quality Rockers
Wasn't sure what to expect but had good customer service from this company and decided to give them a try, glad I did. High quality parts and even better service!
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Rocker arms
Rocker arms fit perfect on my engine ls1 great product
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Ls rockers
Good price, ready to bolt on.
