These Boost Logic billet main engine girdles are made from 7000 series aluminum to add significant rigidity to the VR38 motor. 7000 series aluminum is strong, with a strength comparable to many steels, and has good fatigue strength and average machinability. It has lower resistance to corrosion than many other Al alloys, but has significantly better corrosion resistance than the 2000 alloys.
These have seen uneven bearing wear due to the block flexing with the stock girdle and this problem is resolved with our billet girdle and upgraded ARP Oversized Main Bolts. Reducing the amount of flex in the block prevents premature bearing wear and improves the longevity of the bottom end as a whole.
The Boost Logic billet girdle is designed to only require a line hone, rather than a full line bore like our competitors billet girdles. These are a great addition to any build looking for 1500+ whp and a standard for many engine builders.
You have a few options when selecting which you want. You can go ahead and get your billet main girdle with oversized ARP Main Studs at an additional price. Just select which option you would like before checkout from the drop down menu.
These are a very nice and solid unit weighing in at just a hair under 25lbs. When holding this in your hands compared to the OE you know your holding a MASSIVE Upgrade to the OE Main Girdle!
