Closed Deck EJ257 V4 Long Rod Short Block Off-Road/Adapter Kits and they are often required

and they are often required to deliver fuel well outside of their linear operating range

The Best Option is new bolts

13144AA300 Chain Guide

3 mm bore size (Same size as an OEM gasket)

Closed Deck EJ257 V4 Long Rod Short Block Off-Road/Adapter Kits and they are often requiredThis 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 block in the known problem areas 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