I was wondering if this is an S4 Rail in my S5

If so then My understanding is that washers need to be added to make it fit right? Would these be under the rail or on top?
2nd. the blue adapter at the right with the hose barb screwed into it. I'm guessing this is an AN 6 M12x1.25 adapter? Is there a really easy way to measure it to be sure? (the AN6 Part)
3rd what would my options be to put an S5 Rail back on it WITH the AN adapter?






Any help appreciated.

Eric

 

Yes its an S4 Secondary rail. IIRC the primary is the one that used a plastic spacer. Yes that looks like 6AN. Whats wrong with running the s4 rail? They worked for me on my old s5 engine.

 

its an S4 lower intake too.

 

FührerTüner: Thanks. I suppose nothing is wrong with running the S4 Rail then.
j9fd3s: Thanks for that info. Doesn't the S4 manifold have an EGR Valve? Or is this possibly a JSPEC engine /Manifold?
Does an S4 manifold Line up with an S5 engine intakes? How can I tell if I have an S4 engine in an S5 Body?


Sorry for all the questions.

 

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the USA S4 intake has an EGR valve, its on the bottom rear, a non USA engine has no EGR. the bolt pattern and ports all line up S4 vs S5

need more pics to ID the engine. the S5 engine has threaded holes for the knock sensor over the spark plugs

 

6 port actuators are different on the S4 VS S5 as well.

 

Sorry forgot to mention that this is a Turbo. No 6 port.

 

It was probably converted. S5 fuel rails are formed sheet metal, there is no way to remove the factory FPR if switching to a aftermarket FPR. So many people swap to s4 stuff, as it's cast, and threaded so you can delete the factory stuff with replacement fittings, and the primary rail also has the FPD which can be a failure point leading to fires.