300z caliper/cobra bbk brackets on sale again!
You have a 96' right?
Originally Posted by BoostRevolution
the car its going on is sitting on 20s so I don't think space is going to be a issue. 
*Edit* Is there a different bracket between the 4th gens and the 5 and 5.5 gens?

*Edit* Is there a different bracket between the 4th gens and the 5 and 5.5 gens?
I have some brackets but no rings. But they are on order as we speak. I expect another week to get the new batch of rings and some more brackets.
What's your schedule? I thought you already bought some?
What's your schedule? I thought you already bought some?
Originally Posted by 95maxrider
Jeff, I need to buy both of these ASAP. Where do I send payment?
Originally Posted by Jeff92se
I have some brackets but no rings. But they are on order as we speak. I expect another week to get the new batch of rings and some more brackets.
What's your schedule? I thought you already bought some?
What's your schedule? I thought you already bought some?


I just figured out my rotors are on the verge of imploding, which was evidenced by my terrible braking on the second half on the 1/4 track. These brakes won't last another trip to the track, so I need them ASAP.
These are compatible with the J30 caliper and Cobra rotor, correct?
The price for both is $90, right? Where can I send payment?
Lots still left. Buy them while they are in stock. Remember these parts can also be used for the 2 piston Q45/J30 calipers also. Another great upgrade that still uses the 13" cobra rotor but gains more wheel clearance because the calipers only have pistons on the inner side of the rotor.
Measuring for fitment.
I have used the directions on Matt Blehm's site to determine fitment of his kit. I need about 12mm, so I figure a 15mm spacer should be OK. I have 18 inch wheels with a 45mm offset so diameter is not an issue. What I want to know is if the same spacer(15mm) will allow me to use the 13" Cobra rotor? I would prefer this to the 6th gen rotor, but need confirmation. Do you have any ideas of how I can measure it?
Blehm says to measure out 5.25 from center and that is on a 12.4 inch rotor. Since the Cobra rotor is 13", couldn't I just measure out the 5.25+0.3(1/2 the difference in diameter) or 5.55 inches from center and use the same 2 1/2 inches from inside of wheel to brake disc? Or am I wrong?
Blehm says to measure out 5.25 from center and that is on a 12.4 inch rotor. Since the Cobra rotor is 13", couldn't I just measure out the 5.25+0.3(1/2 the difference in diameter) or 5.55 inches from center and use the same 2 1/2 inches from inside of wheel to brake disc? Or am I wrong?
You won't be able to use my products with the small 12.4" rotors.
I do now have brackets and rings in stock for now.
Originally Posted by maxgtr2000
Jeff, I have q45 calipers, if I get the 12.4 rotors, what all do I need? I sent a p.m but got no reply. Thanks.
Originally Posted by Jeff92se
You won't be able to use my products with the small 12.4" rotors.
I do now have brackets and rings in stock for now.
I do now have brackets and rings in stock for now.
sweet, does that mean mine will be coming soon???
Jeff, I wanted to thank you for sending the brackets & rings so fast. The brackets look really good and durable. As far as rings, do they fit into the inner or outer portion of the rotors center? I bought Ford Motorsport 13" cobra rotors and the rings do not fit into the center hole easily. Am I supposed to use more pressure to "snap" them in?
If you can get them in by light pressure, fine. The rings are supposed to fit into the tapered groove on the rotor and sit on the hub assembly. They can only go on one way if you think about. The thing is, these rings were designed around a rotor. I think rotors from different makers all have small tolerence variations. You might have to put the ring on a grind and carefully get the end that goes into the rotor down by just a fraction.
No. The brackets move the caliper outward and changes the offset. They are designed specifically for the 13" Ford Cobra rotor. I get the same question all the time. People want to use the 12.6" Nissan rotor but don't want to shell out the $ for Matt's brackets.




