I have 2" TTI's on my 446 with eddy heads....fit great. I'd use a 2" on a 500" motor.

The 2" Hookers CAN be made to work too....Unlawful had them on his challenger with eddy heads and no problems.

I tried the 1 7/8" Hooker supercomps and eddys and they burned boots constantly....I changed them out for the TTI's.

Thats all I know really....