Hey there forum, so I bought this 99 mustang gt that has a mmr 800 short block with heads and a cam. Its also pro charged with a P1SC running a 3.20 pulley and the car makes 471whp. I've had issues with this happening but only in 4th gear and usually in the higher rpm range. Btw I have a twin disc clutch that's rated for 800hp so its not slipping and its not traction issues either cause im running 315s in the rear but it sounds like it in the video... Lemme know what you guys think