It's an 8" converter. Didn't check with JW, he just wanted to save some $$ and we figured it would "work" as it is. It does, but could certainly be better set up for the dragster. I didn't realize that the converter could have that much effect on rt's. Of course if it 60'd quicker, in theory the rt's should be quicker too....I'll relay the info.
Thanks,
Johnny