Manifolds comparison between ISF and RCF
04-29-17, 09:43 AM
#1
Driver School Candidate
Thread Starter
Manifolds comparison between ISF and RCF
Hello all,
i hope everyone is doing alright.
i was wondering if the manifolds for these two cars are interchangeabl! Is it possible for me to install an ISF's OEM manifold into my RCF?
It might be a silly question, but id apreciate your answer
i hope everyone is doing alright.
i was wondering if the manifolds for these two cars are interchangeabl! Is it possible for me to install an ISF's OEM manifold into my RCF?
It might be a silly question, but id apreciate your answer
04-29-17, 06:52 PM
#6
Driver School Candidate
Thread Starter
Thank you for the quick reply.
Lou, it seems that the LH side are identical, however the RH side look different.
The cats sizes seem very similar tho, i dont think they require tuning? Im just saying im not an expert.
04-29-17, 07:43 PM
#7
I thought you were talkin' INTAKE manifold, not exhaust
Yes, they bolt right up. However, the RCF's outlet is larger than the ISF:
Flange Exit size Information:
ISF - 60mm (2.4")
RCF - 65mm (2.6")
And no, No tuning would be required.
Lou
Yes, they bolt right up. However, the RCF's outlet is larger than the ISF:Flange Exit size Information:
ISF - 60mm (2.4")
RCF - 65mm (2.6")
And no, No tuning would be required.
Lou
Last edited by flowrider; 04-29-17 at 07:48 PM.
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04-29-17, 11:01 PM
#8
Driver School Candidate
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im planning to replace mine (damaged) with an IS F's, would you recommend doing that?
The dealer's parts are quite expensive here
04-30-17, 05:02 AM
#9
^^^^While the manifold will bolt up to the engine, the ISF exhaust manifold will not bolt up to your exhaust system because of the smaller outlet. The exhaust flange would need to be cut off and replaced and of course, a new gasket.
And, over time the ISF manifolds have been shown to crack. The RCF manifolds have not been out long enough to see if thats also the case. I sold my manifolds to another ISF owner who had a cracked manifold.
Lou
And, over time the ISF manifolds have been shown to crack. The RCF manifolds have not been out long enough to see if thats also the case. I sold my manifolds to another ISF owner who had a cracked manifold.
Lou
04-30-17, 12:16 PM
#11
Driver School Candidate
Thread Starter
^^^^While the manifold will bolt up to the engine, the ISF exhaust manifold will not bolt up to your exhaust system because of the smaller outlet. The exhaust flange would need to be cut off and replaced and of course, a new gasket.
And, over time the ISF manifolds have been shown to crack. The RCF manifolds have not been out long enough to see if thats also the case. I sold my manifolds to another ISF owner who had a cracked manifold.
Lou
And, over time the ISF manifolds have been shown to crack. The RCF manifolds have not been out long enough to see if thats also the case. I sold my manifolds to another ISF owner who had a cracked manifold.
Lou
04-30-17, 01:09 PM
#12
Lexus Champion
04-30-17, 08:54 PM
#14
Driver School Candidate
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