I have had a set of IH bellowed up pipes on the shelf for a few years. My original up pipes just started leaking. I am not able to look at my truck right now and I am wanting to buy some new bolts for the exhaust manifold to up pipe connections. I need to know if anyone knows off hand what size and length and what grade I should get. I would like to get a new set today and I dont know what size is needed. Thanks!