Closed Deck V4, New Case Halves (Outright) Head Studs If you own an EJ20

If you own an EJ20 in a WRX

Basic Specifications:

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

Compatible vehicles:

Closed Deck V4, New Case Halves (Outright) Head Studs If you own an EJ20This 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