ACL Race Series Main Bearing Set - Standard Size 4M2633H-STD - 350Z DE 03-06
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4M2633H-STD · ACL Race Series Main Bearing Set · Standard Size VQ35DE · 350Z DE 2003 to 2006
ACL Race Series Main Bearing Set Standard Size – Nissan 350Z DE
4M2633H-STD · VQ35DE · 2003 to 2006
The ACL Race Series 4M2633H-STD is the engine builder's choice for main bearings on the Nissan VQ35DE. Whether you're doing a standard rebuild on a high-mileage 350Z or building a street performance engine, ACL Race Series bearings deliver better material quality, tighter tolerances, and longer service life than OEM replacements at a price that makes sense on any build.
ACL is an Australian company and one of the world's leading OEM and performance engine bearing manufacturers. The Race Series is the top of their performance line, manufactured to micron tolerances and used by engine builders globally across road, circuit, and endurance applications. The 4M2633H-STD is the standard oil clearance version the correct choice for a standard or mild street build on a standard size crankshaft.
Product specifications
| Specification | Detail |
|---|---|
| Part number | 4M2633H-STD |
| Brand | ACL |
| Series | Race Series |
| Type | Main bearing set |
| Size | Standard (STD) |
| Oil clearance | Standard |
| Material | F780 Trimetal |
| Max wall at crown | 2.009mm |
| Max shaft size | 59.975mm |
| Max oil clearance | 0.058mm |
| Sold as | Set (4 bearings) |
Why ACL Race Series
- Micron tolerance machining with precision measurement systems for consistent wall thickness, crush, and clearance
- F780 Trimetal construction for high strength, excellent seizure resistance, and superior fatigue life
- High strength overlay plate with reduced thickness for improved fatigue properties under high RPM conditions
- No flash plating applied for improved bearing retention and maximum heat transfer
- Outlasts OEM bearings and reduces the risk of premature bearing failure on a worn or rebuilt engine
- Trusted by engine builders worldwide for road, circuit, and endurance applications
Installation
Difficulty
Engine builder
Tools required
Engine assembly tools
Measure before you build. Always verify crankshaft journal size and oil clearance with Plastigage or a micrometer before final assembly. The 4M2633H-STD is the standard oil clearance set — for builds requiring extra clearance, use the 4M2633HX-STD instead. Do not mix bearing halves from different sets.
Fitment
Nissan 350Z Z33 DE · 2003 to 2006 (VQ35DE)
Nissan Skyline V35 · VQ35DE variants
Nissan Stagea M35 · VQ35DE variants
Infiniti G35 · VQ35DE variants
Fits the VQ35DE engine only. Does not fit the 2007 to 2008 350Z HR with the VQ35HR engine. Please confirm crankshaft size and condition before ordering. Contact us if you're unsure and we're happy to help.
For builds requiring extra oil clearance higher RPM, forced induction, or track use — see the ACL 4M2633HX-STD instead. Pair with the ACL Race Series rod bearing set for a complete crank bearing refresh on the VQ35DE.
