Originally Posted by
dyoungre
Is the exhaust diffuser in the exhaust port considered an 'emissions device' that can be removed? I know we can't port, but can this device be removed - and if so, what sort of impact does it tend to make on the performance if left in? My understanding is that it is VERY hard metal.
Thanks for the advice - I'm new to the 13b ....
No you can not remove and no it is not an emissions device. Yes it is very hard metal and not worth cutting even if you could.The turbo housings do not have the diffuser in the exhaust ports, those who want to open up the exhaust ports where the rules might allow or in a street car just swap the NA sleeves with turbo sleeves or use turbo rotor housings.
You can remove the 5th and 6th intake port sleeves, actuators and actuator rods, as well as wire the VDI (S5 only) open. This is worth doing if you have not and is IT legal.
You'll need to run EP if you want to remove the exhaust diffusers...
Mark B. - Dallas, TX
#76 RX-7 2nd Gen
SCCA EP
Former ITS, ITE, NASA PT
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