I got bored a few days back and noticed how square cut the rear exit of my 89 TB was....So I ported the rear of the tb out to match the gasket as well as the I/C runner....The Inner cooler didnt take much but the TB seemed to be at least a 1/4 off.........I really just smoothed it out didnt go to far in.......Searched to see if anyone else wasted their time with these stock TBz......I know I need to get a job..
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