Does anyone have experience with the Bursch stainless steel headers, with heat exchangers? How do they compare to the SSI or other stainless steel heat exchangers? The Bursch are 1 5/8" (41 mm); and the SSI are 1.5" (38 mm). I have a '71T with a 2.3 with Solex cams, carbs and 9.5:1 compression ratio. The use is primarily street, with an occasional autocross.

I appreciate the input.