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Main Caps

Standard or Billet main caps are used in Arrington's HEMI engines. Our standard naturally aspirated HEMIs use standard main caps but our high boost and high horsepower builds can be upgraded with billet main caps. 
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  5 products
5.7 / 6.1L Main Bearing 
Product Rating:
MSRP:$22.99
SKU:MPR-68102976AB
Dimensions:2 x 12 x 6
Weight:2.0 lbs
Price:$21.85
5.7 / 6.1L Main Bearing 
Product Rating:
MSRP:$18.99
SKU:MPR-68102975AB
Dimensions:4.44 x 6.66 x 6.98
Weight:2.0 lbs
Price:$16.25
Arrington Performance Billet Engine Main Cap Set These new engine main caps are a perfect solution for your high performance 5.7L, 6.1L or 6.4L HEMI engine build. Upgrading your main caps will prevent unwanted main cap walk at high RPMs, making them a must for any high horsepower supercharged Mopar application. Without strong main caps, like this set, metal transfer and friction may occur between the cap and block at the center of the bearings. Weak main caps with cap walk can cause problems... 
Product Rating:
MSRP:$699.00
SKU:API-MAINCAPS
Dimensions:6X12X12
Weight:25.0 lbs
Price:$649.00
5.7 / 6.1L HEMI Stud Kit 
Product Rating:
MSRP:$281.88
SKU:ARP-244-5400
Dimensions:3 x 6 x 4
Weight:2.0 lbs
Price:$169.00
5.7 6.1L Main Bearings 
Product Rating:
MSRP:$22.99
SKU:MPR-68102976AB
Dimensions:2 x 12 x 6
Weight:2.0 lbs
Price:$21.85