I've got a OEM Nismo rear chassis damper for sale along with the OEM stay bracket that it mounts to. No welding required just source the bolts that mount the damper to the bracket and swap it out on your car. I have had this sitting for a while and decided I probably won't add it to the car. I also have the front Nismo damper on the car I could be talked into selling as a set for the right price. I will price the rear damper only as pictured with the bracket for Sold
SOLD SOLD SOLD SOLD
I also have an old set of Project Kics R40s with locks. The threads are all good, but one of the keyed lugs is worn. It still comes off and torques correctly but it's aggravating and I got tired of fooli with it at the track. I'll sell those for $110 shipped.
Lastly I have a set of test pipes I purchased from a forum member for measuring purposes. I am now finished with them so I will pass them along. They have no hardware or gaskets but I will sell for $100 shipped to help with that.
Feel free to ask any questions. I may add some more stuff as I clean out my garage.