E-street vs Promaxx vs 440 Source
Of those three choices for unported 84cc pieces, the Ede heads flow the most.
The 75cc chamber version has some valve shrouding that knocks down the low/mid-lift flow.
I’ll take the Ede hardware (valves/springs/retainers/locks) any day over the Chinese heads.
I also like the seat material better.
The Promaxx castings have a kind of funky intake port shape at the opening(same as the SM, Sidewinder, Toth, Performance World, and a few others).
Of those three choices for unported 84cc pieces, the Ede heads flow the most.
The 75cc chamber version has some valve shrouding that knocks down the low/mid-lift flow.
I’ll take the Ede hardware (valves/springs/retainers/locks) any day over the Chinese heads.
I also like the seat material better.
The Promaxx castings have a kind of funky intake port shape at the opening(same as the SM, Sidewinder, Toth, Performance World, and a few others).
