Problem is cp will never do that cuz they would sell about 10 total and I remember calvin saying he would have to sell like 50 for it to be profitable. Hence why there are no aftermarket lt5 cylinders just no market. I understand if there was a bolt on kit it prob would sell some more but especially for drag racing ure further ahead with the trx nate mccoy offers the billet tranny and 3-4 diffrent cylinder options. Seeing how calvin passed recently I highly doubt u will see anything other than 4 stroke or banshee stuff being produced.