The header thread is miles long and filled with a lot of bs that's 5 years old so figured I would ask here

What's a good header that is PROVEN with a dyno on a sc car?

Current setup:
Ap1 Vortech 4.25" pulley
aem fiveomotorsports 750cc injectors
stock header heat wrapped
70mm header back invidia q300

390whp on a heat soaked 23rd pull lol I want 400+ on the current 9psi

 

I went from factory to Toda with good results. A few years after that I went from Toda to Hy-tec with again good results.
currently mid 500s at >20 psi. AP-1, Vortec T-trim, 3.2" pulley, ID 1000s, AEM EMS.

 

Rainh8r saw 15whp @11psi switching from the stock to the J's (this was a back to back comparison...nothing else was changed other than the tune with each header). I only saw some small differences going from the J's to the Hytech.

Comparison in the links in my sig.

 

Plm j replica with tabs for oem heat shields, coated internally and externally, and heat wrap it is

Thanks for the reply appreciate you taking a couple of minutes to post massive me hours researching