car has 153,xxx miles, stock turbo, stock manifold, stock DP i bought this car last october with 129,xxx on it and the heatshield was on the mani, but when i took it off i noticed the bigger of the 2 cracks, the smaller one was barely noticable. the car was 100% stock when i got it and didnt show any sign of any modifications. im now running 8-8.5 psi, superstock tune on ssafc, catback, CAI, hard pipes, SSQV, 1 step colder plugs, and electronic boost controller. you can here the tick/hiss from the cracks when i give it a cold start up but after 3 mins, it goes away when it warms up. and i have never had the manifold off or torqued the bolts.