I bought a full Grom exhaust for my Hellcat and it wouldnt fit either, I ended up keeping the stock header pipe and cutting the exhaust I bought to make it slip over the stock header pipe. So far it has worked out good with just a slight amount of exhaust leaking where I slipped it over the stock header. I might need to weld it up in the future or maybe I could just put a clamp on it. Hopefully someone will make a complete exhaust that bolts on the the Vaders and Hellcats, I haven't found one yet.

i have a grom exhaust, it will need some modification, heat it up and twisting look at my fotos

dude, that thing looks bad ass! Where did you get the chain adjusters? I installed Grom adjusters on my Hellcat but they really arent much better than the ones that came with it and they are really tight inside the swingarm. Did you install new brake rotors too?

There are two issues to using a Grom Exhaust on these Clones,
1. Groms Exhaust port is on a slightly different angle
2. The Studs on the Exhaust port are a different size
Ive read somewhere else that you can use a NCC PIPE ADAPTER and change out the studs on the exhaust port to accept the full Honda Grom Exhaust setup in case anyone was interested. Disclaimer: I have not tried this myself but it seems like a feasible pretty cheap option to try before cutting things up. :tup:

Do you happen to know the part number for the big bore kit you ordered from TBolt?