Billet Main Caps

Our VG30DETT Billet Main Caps and Girdles are machined from 4140 Chromoly Steel. Engine will need to be line bored/honed and also machining for the thrust washer once these are installed. Comes with ARP Bolts to attach girdles to main caps ...

Our VQ35DE billet caps are machined from 4140 chromoly steel. A line bore/hone will be needed once these are installed. Will not fit VQ35HR or VQ35VHR blocks. ...

Our TB48 billet Main Caps are machined from pure 4140 Chromoly Steel. Engine will need to be line bored/honed and also machining for the thrust washer once these are installed. We can provide these services if needed. ...

Add strength to your BP block with our Billet Main Caps. Caps are machined from pure 4140 chromoly steel. New Mazworx BP Billet Main caps accept standard size main studs. A line bore/hone will be needed once these are installed. ...

With the dwindling availability of OEM SR20 parts we do what we do best and make a solution to the problem! Introducing our billet girdle for the SR20. This girdle replaces the factory one and can be used with standard or half inch main studs and comes pre notched to clear stroker kits and big aluminum rods.

Add strength to your SR block with our SR20 Billet Main Caps. Caps are machined from pure 4140 chromoly steel. New Mazworx SR20 Billet Main caps accept standard size main studs. The Block does not need to be machined to accept 1/2" main studs. A line bore/hone will be needed once these are installed.Instructions ...

Our 2JZ billet caps are machined from pure 4140 chromoly steel. Engine will need to be line bored/honed and also machining for the thrust washer once these are installed. We recommend using ARP main studs in conjunction with our billet caps. For extreme applications we recommend using ARP L19 studs. ...

Our SR20 billet caps are machined from pure 4140 chromoly steel. Engine will need to be machined to accept the new 1/2" main studs and a line bore/hone will be needed once these are installed. Instructions ...