Make that 230rwhp streetport 13bre n/a
Joined: Feb 2006
Posts: 3,162
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From: London, Ontario, Canada
I'd rather have a header that just bolts on. Modifying my engine so a header will fit isn't really in the plans. I'll be looking for something to replace my RB SP exhaust and I'm not sure if I can justify the $1000 CDN it will cost me for the Rotary Shack header.
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From: Pataskala, Ohio
Its easy enough for us to make a 12a header. That is not a problem. The cost will be pricey still unless you would like a mild steel version
Joined: Jul 2002
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From: District of Columbia
you cannot let this thread die. I will not let it happen. Did you ever throw a bellmouth on it? puls i want nore engine pix, and hopefully some porting pix. are you selling the templates yet?
If we can get it I would like an update on the header. I race a first gen and have 12A and 13B motors that I can run. In theory we can run the big motor on big tracks and take the weight penalty and switch back to the small motor on the tight tracks. While I have two different headers my friend has one header. Both primary pipes are on the same plane and use a slip fit connector. It was designed to allow enough movement to fit either motor. I would expect a little blow by but it is actually pretty tight and I can't feel a leak, especially since there is no back pressure. I don't know if that could be incorporated here.
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From: Pataskala, Ohio
I have not had the chance to tinker with it for a while now, but I am getting ready to install the production header which is much nicer than the one on there. See if that may net a few more ponies, and throw on your bellmouth idea to push over 240?? Porting templates are able to be ordered at any time. I am working on photos of them. I did dig up some of the ports in this engine, so enjoy!

I know what you mean about having it just bolt on and I agree to an extent. However, just to be clear, I think he meant ovaling and porting the header itself (bolt holes and flange inlets), not your engine.
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From: Pataskala, Ohio
No I dont think I have any. Sorry!
Info? No real updates, its just getting driven and nothing has been changed. Still trying to get around to testing the production header.
It will work on the TII perfectly fine too.
Info? No real updates, its just getting driven and nothing has been changed. Still trying to get around to testing the production header.
It will work on the TII perfectly fine too.
So those templates will work on TII irons.....hmmm. This is giving me an idea for an engine in my RX-4 which just so happens to be your old RX-4.
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From: Pataskala, Ohio
So after beating on this poor car with no maintance, the brakes were finally on the last leg! One caliper was frozen, rotors completely shot and it was dangerous to drive with even 50rwhp let alone 230rwhp. So I decided to put some money into the little guy! All new rotors, pads, wheel bearings, calipers, and even Progress lowering springs with some tokico HP shocks! Its a fun safe car again! Horray!


Joined: Feb 2006
Posts: 3,162
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From: London, Ontario, Canada
Put poly bushings in every link in the suspension, it will do wonders for the ride and response after those upgrades.
Looks like I won't be needing a 12A header. I blew my motor in August and have decided to build a 4-port 13B. Just got an RX-4 13B manifold, and will be considering a full exhaust overhaul later this year or next to really make her move. Can't wait to see the finished product.
Looks like I won't be needing a 12A header. I blew my motor in August and have decided to build a 4-port 13B. Just got an RX-4 13B manifold, and will be considering a full exhaust overhaul later this year or next to really make her move. Can't wait to see the finished product.





