I'm looking for a 4 barrel intake manifold for 13B REW engine
WantedEngine - Intake/Fuel
Apr 17, 2025, 12:56 PM | Replies: 3 | Views: 425
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Price
Any Price
- Location Tampa, FL, 33616, USA
- Condition New or Used
- Compatibility
| Make | Model | Year |
|---|---|---|
| Mazda | RX-7 | 1993 - 1995 |
Description:
Hi, I'm having a hard time looking for a 4 barrel intake manifold for 13B-REW engine off an FD or Cosmo bolt pattern. My engine does not have semi p ports so I need an intake with no semi! Speedmaster makes there own version of an intake but it has semi ports already made into the manifold. Dont want to mess with sealing those up. If you have anything please send me a private message with a number to reach out, thanks!
-Sammy
I have a speedmasters and the semi p-ports are drilled straight into the 2ndary runners so it meets at a blind angle. No smoothing/shaping to induce flow into the semi-p runners.
There would be 0 flow disturbance running it without p-ports.
If you did need to plug semi-p ports for OCD it would be as easy as pressing in a dowel of plastic or aluminum and trimming the end from the holley flange side.
One nice thing is its a copy of an efi manofold with equal runners instead of an angled carb manifold with one short and one long 2ndary runner.
Another nice thing is it has center manifold bolt for better sealing.
The only bummer is they are ported for cosmo ports, so REW side housings have to be port matched.
There would be 0 flow disturbance running it without p-ports.
If you did need to plug semi-p ports for OCD it would be as easy as pressing in a dowel of plastic or aluminum and trimming the end from the holley flange side.
One nice thing is its a copy of an efi manofold with equal runners instead of an angled carb manifold with one short and one long 2ndary runner.
Another nice thing is it has center manifold bolt for better sealing.
The only bummer is they are ported for cosmo ports, so REW side housings have to be port matched.
Last edited by BLUE TII; Apr 17, 2025 at 04:27 PM.
My engine has been modified to Cosmo Spec, which is great. I plan to just order the Speedmasters and give them a try. I will need to plug the semi ports, but I'm confident I can come up with a solution to manage my OCD. Thanks for the feedback!
I want to correct one point I made from memory after holding the manifold again.
if you press in rod to block the semi-p ports you have access to trim the ends to shape from the 2ndary ports, not the 4 barrell flange end.
if you press in rod to block the semi-p ports you have access to trim the ends to shape from the 2ndary ports, not the 4 barrell flange end.