I'm old, don't like being chilled. Pulled trigger on Tangerine Racing header with HE's. This is excess to my needs. Never dyno'ed car with these, but I routinely spun my 2270 to more than 7k. Sound effects are awesome.

Prefer local pickup but willing to meet up @ Carlisle. $600. Click to view attachment

I used equal length headers like this on my Son's E Production 1.8 CC racecar back in the 90s because I Read that they gave 5HP at 5000 RPM on a stock 2.0. The heads were built by Mike Stimson in Cailfornia who insisted we used this setup . When installing the stub pipes he used a long tool and could match port the exhaust ports ( a weak point on a TY4) The stub pipes were all numbered so could assemble correctly.