i drive a 05 stage 1 with sri, hks bov, and 3" tbe. yesterday i installed agp wga and now when i go wot in 3-4th gear i hear an air fluttering sound and my boost gauge flutters between 14-16 psi. ive searched and dont think its ptb cuz its happening at wot. any help would be appreciated. thx. and ya im kinda new to modding so sry to sound new lol.