I'm looking for which exhaust to buy for my car, a 1980 RX7 GS. I have swapped in a '91 S5 N/A 13B 6 port. I called racing beat and asked them and the guy told me that I needed system # 16424SP, so I searched the website and they dont list it, unless you remove the "SP" then it comes up as a system for the 84-85 GSL-SE?
I dont know what do you guys think?

 

yea, thats correct, you need the gslse system.

 

Learn to weld and save your money.

 

Ya, really. The rb muffler is so expensive. Its a rip off. There are better mufflers. Borla is awesome. Good luck. Look it up with the search button

 

If you're going for the RB system, spend the extra and buy the SE streetport one. That way if you rebuild and port later, you will be set.

 

ok, thanks

 

The RB header and presilencer is great, practicaly undestructable. The muffler is not .. corrosion rotted out the U shaped pipe that connects to the stock connect pipe after only a few years. Get something stainless.

 

Buy SDJ headers and get a shop to build the rest would be well worth the money

 

i need a whole new exhaust system...

i wanted to know if it is really needed to have anything bigger than a 2.5'' system.
i have an N/A SE and i am planning on going turbo. i havent street ported yet but will in the near future. i've seen some 3'' systems and i wanted to know whats the gain on a 3'' over a 2.5''?

BTW i'll be welding the system myself. i have all the tools,time and knowledge to weld.

thx

 

alot of the guys here run 3" for turbo and 2.5" for N/A I personally run 2.5" on my N/A 12a, I think it was that the 2.5" is still semi restrive at wide open throttle especially if you run your car up to about 8,000 rpms or so underboost. I have noted a huge improvement with the 2.5" on the top end but you have to also know that it will effect the low end too, it will move your power band slightly higher the bigger you go with the tubing. What type headers are you planning on going with? I always recommend the SDJ, they can be custom made to your specs (ie, dual/single outlet, short/long primaries, connecting pipe diameter, with/without O2 bung i usually recommend with it for tuning sake later on... ect) This is the link to my SDJ header and as you will see quality is pretty darn good

https://www.rx7club.com/showthread.p...&highlight=SDJ

 

im gonna be N/A for a bit then i'll go turbo so i guess im going 3".
i'm not too sure about the specs yet( alot of searching to do)
i was going with the RB but thats cause i didnt know any better.
im going with SDJ for sure. im trying to do things once, i dont wanna have to upgrade later because i go turbo.

thx DJ

 

Just one thing though ... If you're going turbo later on why would you want to spend top money on a header you're going to not use later on though? unless your later is in a very long while ...

 

I have received a couple of messages concerning how to buy these, They were on ebay before but I don't see them there anymore, I'm unsure of his website if anyright now, but his last phone number that I used earlier this year was 1-803-646-1840 His name is Jon. Besides that I'm not sure.

 

Dont the sdj headers cost like 400 bucks. What is the improvement over the rb headers. Just curious

 

im getting them when i have the turbo kit all together. for now, i think, i'll just buy a rb header till i save up for the turbo kit and sdj header


yeah, i was searching it and i couldnt find the site or any on ebay...
i really hope he gets his site up and running sometime soon.
i'll try and call him when i have the specs and money for the header.

 

The entire SDJ exhaust is reputed to be almost the same price as RB though and it is worth more power.

 

Thanks aussiesmg

 

man is anyone ever going to some results with this header if u have said there has been alot of r-d on this then show it

 

The SDJ header can't be better, its not as shiny as the Rb header. Jk

 

I still put faith in RB, but except for headers I'd be making my own. I did make my own in fact and used a system that some one else on here pioneered. I used two Borla straight through mufflers and a RB presilencer, sounds great.

 

people looking for results ... my setup 12a SP holley 465 with intake mani, and straight 2.5" opted for 147.3rwhp with the SDJ headers

 

ahh noone will ever show results between the 2, its all hear say