Really good fits. The design makes them a little tricky to install on manifolds, but they work well. My short JBA headers for my Ram had a set of locks and clips that I couldn't install due to the primary bolting up and back towards the cat. This is not due to the hardware, but to the design of the header. I hope it doesn't drip. The screw heads are 11mm in diameter so make sure you have an 11mm wrench. Even when installing short connectors, a 1/4" universal joint adapter and extension kit will save you a lot of swearing when threading the threads.