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Exhaust manifold interchangeability?
- Thread starter Bdiddy11
- Start date
tbburg
NAXJA Forum User
- Location
- Scottsdale AZ
Two major revisions.
All Renix and HO up to 99 are similar, and you can bolt any manifold to any head. However, the renix motors have an EGR line that threads into the collector. To keep the EGR, you would have to weld a bung onto a later mainfold.
They substantially revised the exhaust port shape on the '00 head, and the manifolds don't fit the earlier heads(They'll bolt up, but won't cover the port.)
All Renix and HO up to 99 are similar, and you can bolt any manifold to any head. However, the renix motors have an EGR line that threads into the collector. To keep the EGR, you would have to weld a bung onto a later mainfold.
They substantially revised the exhaust port shape on the '00 head, and the manifolds don't fit the earlier heads(They'll bolt up, but won't cover the port.)
cruiser54
NAXJA Forum User
- Location
- Prescott, Az
Additionally, the HO manifolds terminate in a different spot than the Renix. Not a big problem if you replace the headpipe.
The HO has the oxygen sensor in the headpipe where the Renix has a bung in the manifold for it.
sjx40250
NAXJA Forum User
- Location
- Alexandria VA
Good question as I am thinking about taking my Borla header off my 90 and putting it on my 98. Would that work?
cruiser54
NAXJA Forum User
- Location
- Prescott, Az
Not without a headpipe change.
sjx40250
NAXJA Forum User
- Location
- Alexandria VA
Headpipe? Header, crossover pipe?
cruiser54
NAXJA Forum User
- Location
- Prescott, Az
The two manifolds terminate at a different spot. Therefore a headpipe (the pipe that bolts to the collector) would need to be changed to match which ever manifold you're using.
sjx40250
NAXJA Forum User
- Location
- Alexandria VA
Ah, well I have a complete system and would change everything from the header back. The headpipe is often referred to as the cross-over pipe. Fun to learn new terms.
