factory exhaust manifold ID

I have 2 TTI exhaust systems on my cars, one on a C body and the other on my 69 Coronet R/T. Both from manifolds-back. Yes, they are high priced but I feel they are well worth the money. They fit fantastic, tuck under the car so nice that you can't hardly see them from the side. They sound good, not real loud. The customer service is the best!