You're all scared to have an opinion. Scared of getting flamed by the next guy so you just agree. Although I think his box is tuned way too low and the mesh is going to limit his pressure, 153 is way possible on two W7 13's. Isn't it team Phat hertz hitting 153 in A GMC Jimmy with two Type R's??? What I'm saying is its possible. If it were two RE RE tens, then I would call bullshiit. However its 13W7's come on...I hit 138 with a blown sub (W6 trio 12") in a single chamber ported box. Yes it was AC so just chill. No flammage needed. It was on the dash and windows were up. To top it off it was a trunk box in a 63 Nova.