King MB4508SI STD SI Main Bearing Set Honda/Acura J30 J32 J35 3.0L 3.2L 3.5L V6

Vehicle Fitment

• 1997-2003 Acura CL (Base, Premium, Type-S, FWD, 3.0L/3.2L V6 J30A1/J32A2)
• 2001-2006 Acura MDX (Base, Touring, AWD, 3.5L V6 J35A3/J35A4)
• 2013-2018 Acura RDX (Base, AWD/FWD, 3.5L V6 J35Y3/J35Y4)
• 2005-2008 Acura RL (Base, AWD, 3.5L V6 J35A8)
• 2014-2015 Acura RLX (Base, Sport Hybrid SH-AWD, FWD/AWD, 3.5L V6 J35Y5)
• 1999-2014 Acura TL (Base, Type-S, SH-AWD, FWD/AWD, 3.2L/3.5L V6 J32A1/J32A3/J35A8/J35Z6)
• 2015-2016 Acura TLX (Base, SH-AWD, FWD/AWD, 3.5L V6 J35Y5)
• 2010-2014 Acura TSX (Base, V6, Special Edition, FWD, 3.5L V6 J35Z4)
• 1998-2017 Honda Accord (EX, LX, SE, Sport, EX-L, V6, FWD, 3.0L/3.5L V6 J30A1/J30A4/J35A4/J35Z3)
• 2012-2015 Honda Crosstour / 2010-2011 Accord Crosstour (EX, EX-L, FWD/AWD, 3.5L V6 J35Z4)
• 2001-2006 Acura MDX (Base, Touring, AWD, 3.5L V6)
• 1999-2017 Honda Odyssey (LX, EX, EX-L, Touring, Touring Elite, FWD, 3.5L V6 J35A1/J35A4/J35A6/J35Z4/J35Y5)
• 2003-2016 Honda Pilot (LX, EX, EX-L, Touring, Elite, FWD/AWD, 3.5L V6 J35A4/J35A6/J35Z4/J35Y5)
• 2006-2014 Honda Ridgeline (RT, RTS, RTL, RTX, RWD/AWD, 3.5L V6 J35A9)
• 2006-2007 Saturn Vue (Base, Green Line, Red Line, FWD/AWD, 3.5L V6 J35Z2)

Fitment Notes

• Fits Honda J30, J32, and J35 Series V6 engines only - does not fit J37 (Acura TL 3.7L) or J32A2/J37A1 variants; verify engine code before ordering
• Standard (STD) size - for use on crankshafts at factory main journal diameter; always measure journals before ordering
• SI Series = bi-metal aluminum silicon construction blended with 2.5-3% silicon; ideal OE-replacement grade for medium-load naturally aspirated gasoline V6 engines
• Available in +0.25mm and +0.50mm undersizes under separate part numbers for ground crankshafts
• Acura RDX 2013-2018 uses the J35Y series - confirmed fitment; 2007-2012 RDX uses a turbocharged K23A1 I4 - does not fit

Features

• SI Series bi-metal aluminum silicon construction with 2.5-3% silicon content for enhanced strength and wear resistance on nodular cast iron crankshafts
• Improved crankshaft finish characteristics reduce microscopic ferrite peaks on ground or polished journals for better oil film stability
• Lead-free construction meets current environmental compliance standards
• Improved oil clearance over OE specification reduces wear and extends crankshaft service life
• Full 4-pair set covers all main crankshaft journals in the V6 engine
• Tight wall thickness tolerances ensure consistent oil clearance across all 4 main journals
• Suitable for OE replacement, street rebuilds, and naturally aspirated performance applications
• Manufactured under IATF 16949 and SAE AS 9100 certified quality control

Specifications

• Part Number: MB4508SI
• Size: Standard (STD)
• Series: SI (Bi-Metal Aluminum Silicon - OE Replacement)
• Engine: Honda J30 / J32 / J35 Series 3.0L-3.5L V6 (SOHC, 24-Valve)
• Crankshaft Journal Diameter (STD): 71.976 / 71.999 mm (2.8337 / 2.8346 in)
• Housing Bore Diameter (STD): 77.036 / 77.061 mm (3.0329 / 3.0339 in)
• Max Wall Thickness: 2.504 mm (0.0986 in)
• Bearing Length: 17.90 mm (0.705 in)
• Position: Crankshaft Main (Upper and Lower shells)
• Quantity: 4 pairs (8 shells total - full V6 main bearing set)
• Available Sizes: STD / +0.25mm / +0.50mm

Included Components

• 4x Upper Main Bearing Shells
• 4x Lower Main Bearing Shells

Product Description

The King MB4508SI is a standard-size crankshaft main bearing set engineered for the Honda J-Series V6 engine family - covering the J30, J32, and J35 engine codes across a wide range of Honda and Acura vehicles from 1997 through 2017. The SI Series uses a bi-metal aluminum silicon structure with 2.5-3% silicon content, providing excellent wear resistance and compatibility with nodular cast iron crankshafts - the ideal OE-replacement material for medium-load naturally aspirated V6 engines in this family.

As a standard-size set, the MB4508SI is designed for J-Series crankshafts at factory main journal diameter and requires no grinding or modification. It is the go-to choice for engine rebuilds on the Accord V6, Odyssey, Pilot, Ridgeline, MDX, TL, RL, RDX V6, and TLX where the crankshaft is in good condition. Always measure crankshaft journal diameters with a precision micrometer before ordering - undersized variants are available under separate part numbers for crankshafts that have been reconditioned.