Main Stud Kits

By installing an ARP main stud kit, you can eliminate main cap walk and fretting, and protect the threads in your cylinder block. Manufactured in ARP’s factory using the best materials, processes, designs and engineering, every ARP main stud kit meets or exceeds the most stringent aerospace specifications.

All kits are complete with hardened parallel-ground washers and aerospace quality nuts. Some applications have provisions for mounting windage trays and have specially designed stand off studs with serrated lock nuts to position the windage tray and lock it securely in place. all studs are 190,000psi tensile strength.
BMC
     
Part Number - 2-Blt Main Part Number - 4-Blt Main Application
AR206-5401   A-series
AR206-5402   B- Series W/3 Main crank
AR206-5403   B- Series W/5 Main crank




BUICK
     
Part Number - 2-Blt Main Part Number - 4-Blt Main Application
AR123-5401   V6 Stage I &II
  AR222-5602 V6 Stage II without windage tray
AR124-5401   215ci Alum. V6



CHEVY, SMALL BLOCK-CAST IRON
     
Part Number - 2-Blt Main Part Number - 4-Blt Main Application
AR134-5401   Large journal, without windage tray
AR234-5501   Large journal, with windage tray
AR134-5402   *Small journal without windage tray
  AR134-5601 Without windage tray
  AR234-5601 With windage tray
  AR234-5602 With splayed cap bolts




CHEVY, BIG BLOCK-CAST IRON
     
Part Number - 2-Blt Main Part Number - 4-Blt Main Application
  AR135-5402 2 Bolt mains, without windage tray
AR234-5501   Large journal, with windage tray
AR135-5601   4bolt mains, without windage tray
  AR135-5603 4bolt mains, aluminium block, without windage tray
  AR235-5502 2bolt mains, with windage tray
  AR235-5701 4 bolt mains, with windage tray



CHEVY, V6 & INLINE 6
     
Part Number - 2-Blt Main Part Number - 4-Blt Main Application
AR233-5602   900, without windage tray
  AR233-5601 900, with spayed cap bolts




CHRYSLER
     
Part Number - 2-Blt Main Part Number - 4-Blt Main Application
AR140-5401   Mopar all V8, 2.2L, 4CYL, 11mm
AR245-5602   KB Hemi 426



FORD, SMALL BLOCK
     
Part Number - 2-Blt Main Part Number - 4-Blt Main Application
AR254-5501   289-302 with windage tray
AR154-5401   289-302
  AR 154-5605 302, SVO
AR154-5407   302, Dual or rear sump oil pan
AR154-5403   351ci, Windsor
  AR 154-5603 351ci, SVO
AR154-5404 AR154-5604 351ci, Cleveland





FORD, BIG BLOCK
     
Part Number - 2-Blt Main Part Number - 4-Blt Main Application
AR155-5401   390-428ci FE Series
AR155-5402 AR155-5501 429-460-385ci series