I use the 22 alu radiator that Mancini sell but you need to fill out a form to have it made for your car ! If it matters to you i have a 505 rb hookt up to that radiator whit 600+hp and it works realy great combined whit a mr gasket 160f full flow termostat that results in 165-175f when driveing and it can idel forever ! I do use a hi flow mp water pump whit steel impeller also! Stan away from castingen impeller pump is my advice becas the are no good crap....