In LS-series engines, camshaft bearings can be surprisingly tricky to select — there are multiple sizes and design variants. This guide compiles the most important dimensions and part numbers into one clear reference table. You can also find direct links to suitable products in our store below.
⬇️ Engines covered by these bearings
LS1, LS2, LS3, LS6, LS7, LS9, LQ4, LQ9, LM7, LR4, L76, L98, LSX (oversize), Dart, RHS, Warhawk (55 mm cam), LT1, LT4, L83, L86, L8T and other Gen V / LT engines.
⬇️ LS Cam Bearings – Technical Specifications & Compatibility
| Engine Type / Application | Journal Ø + width (in) | Housing Bore Ø + width (in) | M77 / Clevite Part | Durabond / ACL / Other Part | Notes |
|---|---|---|---|---|---|
| LS1 / LS2 (Gen III 1st design) | 2.1650–2.1670 (W 0.880") | 2.3260–2.3280 (W 0.880") | SH-1814S | CHP-10, 5C1000S-00 | Early Gen III blocks with 1st design cam tunnel. |
| LS2 / LS3 / LS6 (Gen III–IV, 2nd design) | 2.1650–2.1670 (W 0.900") | 2.3460–2.3480 (W 0.900") | SH-2125S | CHP-25 / CHP-25T, 5C1001S-00, 1923M | Most common LS cam bearing size (LS2, LS3, LS6 and many Gen III/IV blocks). |
| LS7 / LS9 / Late LS | 2.1650–2.1670 (W 0.950") | 2.3460–2.3480 (W 0.950") | SH-2157S | CHP-25 / CHP-25T | Same bore as LS3 but longer bearing and different oiling configuration. |
| LSX / Aftermarket (Big Bore Cam / Oversize, 55 mm) | 2.1820–2.1825 (W 0.950") | 2.3550–2.3760 (W 0.950") | SH-2142S | GMP-9 / GMP-10 / GMP-25, Dart 32210101 (1 pc), Dart 32210101-5 (5 pcs), STRGM-55-T1 | Aftermarket blocks (RHS, Dart, Warhawk, GM LSX etc.). 55 mm cam tunnel, 5-bearing set. |
| Gen V / LT (LT1, LT4, L83, L86…) | 2.1650–2.1670 (W 0.900") | 2.3460–2.3480 (W 0.900") | — | CHP-26T | LT-specific cam bearing set. Same bore as 2nd design LS, different oiling/pin coating. |
| RHS LS Race Block (single bearing) | — | — | — | RHS 549202-1 (1 pc) | Replacement bearing for RHS aluminum LS race blocks. Sold individually (5 needed per engine). |
⬇️ LS Cam Bearings in Our Store
- Dura-Bond - CHP-25 - HP Cam Bearing Set - GM LS 08-10
- Dura-Bond - CHP-10 - HP Cam Bearing Set - GM LS1
- Sealed Power - 1888M - Camshaft Bearing - Standard Journal - GM LS-Series
- Dura-Bond - CH-10 - Cam Bearing Set - GM LS1 / LS6 / Vortec
- RHS - 549202-1 - Cam Bearing - LS Block (1pc)
- ACL Bearings - 5C1000S-00 - Camshaft Bearing - Standard Journal - GM LS-Series
- ACL Bearings - 5C1001S-00 - Camshaft Bearing - Standard Journal - GM LS-Series
- Clevite M77 SH-1814S - Camshaft Bearing - Standard Journal - GM LS-Series - Kit
- Clevite M77 SH-2125S - Camshaft Bearing - Standard Journal - GM LS-Series - Kit
- Clevite M77 SH-2142S - Camshaft Bearing - Standard Journal - GM LS-Series - Kit
- Clevite M77 SH-2157S - Camshaft Bearing - Standard Journal - GM LS-Series - Kit
- Dart - 32210101 - Coated Cam Bearing (1) - SBC 55mm Babbit
- Dart - 32210101-5 - Cam Bearing Set - Coated SBC w/55mm Dia.
- Dura-Bond - CH-25 - Cam Bearing Set - GM LS 08-10
- Dura-Bond - CHP-10T - HP Cam Bearing Set - GM LS1 Coated
- Dura-Bond - CHP-25R1 - Cam Bearing Set GM LS w/.010 Oversized OD
- Dura-Bond - CHP-25T - HP Cam Bearing Set - GM LS 08-10 Coated
- Dura-Bond - GMP-10T - Cam Bearing Set - Dart LS Next Block Coated
- Dura-Bond - GMP-25 - HP Cam Bearing Set - GM LSX Blocks
- Dura-Bond - GMP-25T - HP Cam Bearing Set - GM LSX Blocks Coated
- Dura-Bond - GMP-9 - HP Cam Bearing Set - RHS LS Block
- Dura-Bond - GMP-9T - HP Cam Bearing Set - RHS LS Block - Coated
- King Bearings - CS5172HPT - Camshaft Bearing - HP Series - Standard Journal - GM LS-Series
- Sealed Power - 1923M - Camshaft Bearing - Standard Journal - GM LS-Series
- Straub Technologies - STRGM-55-T1 - 55mm Babbit Cam Bearing Set -Coated w/1 Hole
- Dura-Bond - CHP-26T - Cam Bearing Set GM GenV LT1/LT4 Coated
⚡ Cam Saver and Block Saver – What Do They Mean?
⚠️ Installation Tips
- Correct oil hole alignment is critical, especially on LS7 blocks.
- STD cam journal size is 2.165" – fits most LS blocks.
- 55 mm cam (CH-25 / CHP-25 / CHP-26T) is intended for aftermarket blocks.
- Recommended clearance: 0.0015–0.0025".
- Use Comp Cams - 5312 - Cam Bearing Installation Kit cam bearing installation tool for easier assembly.
⚡ Tip: For high-performance builds, consider harder materials or coated versions (e.g. CH-23HP), which offer better wear resistance at high RPM and oil pressure.
➡️ This page serves as both a technical reference and a shopping list – all products are directly linked to the store.
⚠️ Disclaimer: All dimensions and information are based on official manufacturer catalogs (M77/Clevite, Durabond, ACL and others). Always measure the cam tunnel and journal size before installation. LS blocks may have production tolerances and design variations. If the bearing doesn’t fit properly, do not force it — select the correct model. Final responsibility for installation lies with the builder.