Well as most of you might know the gasket between the cat an exhaust front pipe is a big O-ring that sits in a rebate made for it, but when you buy an after market exhaust it does not have this so you will need a gasket that toyota do not do... Well i went to a local motor factor parts place (kevin-cooper's) with a scetch of the end of the pipe and matched a gasket to it... The bolt holes are pretty spot on maybe a little adjustment but nothink really... They said if you go into most place's an give the code from this they can supplie the gasket... This gasket was a massive ÂÃ