most the bigger turbo ve's are built bottem end ....mine is a de block ..that is sleeved , but it has ve water and oil pumps and a head ....so it is a hybrid but it is more ve then de , but think the JWT is great , it is just not tuneable , every car is little differant , it is hard to get it perfect from across the country , so you end up with a fairly coservitive tune that will work but it is no means perfectly ideal , with most cars there is defenetly more safe power left on the table with the JWT , I think the calum r/t is the best way to go on a budget , because it leaves yiou with the ability to get the car tuned , if you can not get it tuned the the JWT will work vary well because you order it , when it gets there put it in set fuel pressure and go for a spin ....makes it awful easy ....it is about choosing you poison