I do not sell bastard valve size heads that should not be used with the VW engine such as the 041. See below about valve sizes. GB 801-HEADS is highly recommended reading if you want the most for what you spend. Any larger valve sizes should only be used when proper combinations provide a matched system from air cleaner to tail pipe. After all, you can't get it in if you can't get it out and if you can't get it out it provides less performance and runs hotter. Any restriction in the entire system will not provide good all around performance and will likely run hotter and make tuning extremely hard. That is why all automotive manufacturers provide a proper balance from intake to exhaust valve sizes with the only exception being smog controlled heads.