All depends on header and intake manifold used!!!
For example my setup with Tri Y header I could activate al low as 4600 with the 4-1 I have to activate cams a 5900 for best results!!
On stock SR20VE on stock IM and SSAC header 4600-4800 sounds spot on!!
For example my setup with Tri Y header I could activate al low as 4600 with the 4-1 I have to activate cams a 5900 for best results!!
On stock SR20VE on stock IM and SSAC header 4600-4800 sounds spot on!!