Closed Deck V4, New Case Halves (Outright) Head Studs maximum variance is only 5

maximum variance is only 5 degrees from the most bent to the least bent runner

Quicker engagement

New O-Ring Provided

or if it is for race use

Closed Deck V4, New Case Halves (Outright) Head Studs maximum variance is only 5This closed deck block design has been proven to withstand extreme boost levels resulting in high cylinder pressures without the worry of cracking a sleeve. The billet material that reinforces the combustion area has been further optimized with our V4 closed deck making it a far superior product to any sleeved block. With a closed deck block the stock sleeves are still in place eliminating all risk of dropping sleeves and pushing coolant that you have