Quote:
Originally Posted by Umbriel
Only thing you would be leaving on the table with 2 inch over 1 7/8 might be some low end torque, you aren't going to lose hp with a bigger primary.
With that being said I have the 2 inch TSP headers and they fit perfectly fine and I was able to get a Rotofab, E85 kit and tuning with the money I saved.
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I have proof, do you?
I have been dynoing engines since 1987, the avg. loss is 15h.p. I have a lot of dyno sheets that prove this on different CI of SBC engines. Feel free to stop by & I'll put a LT1 on the dyno & prove that 2" primaries LOSE h.p. over 1-7/8"