How to see if my manifold is RS?

[alolympic]

I know that the RS manifolds have RS written on them but I just can't seem to get a good view.
I have tried a small mirror under the fuel rail but I can't seem to see much. Can anyone be more specific with how to see it? Should I be able to feel the raised lettering somehow if I can get my hand underneath?

 

[CHRISK172+]

Take the fuel rail cover off, 2 x 10mm head nuts.

 

[alolympic]

Ta!
I knew I could do that obviously....

 

[CHRISK172+]

I had the RS inlet on my 04' 172 but swapped it for for an AWT matched set. It's said that they don't gain as much as the non-RS inlets, but there done now and i've gained what i've gained.....however much that is??

 

[Andyman]

Stock vs RS RS is meant to be better.

After porting, no difference and no advantage which one you have

 

[CHRISK172+]

The RS is supposed to be the better inlet, not exactly sure why, think it's an improved casting with better flow. Once they have been machined tho, there is no difference whatsoever and both are improved. I had an RS but swapped for a machined non-rs knowing it would have the optimum flow.

 

[alolympic]

I had the RS inlet on my 04' 172 but swapped it for for an AWT matched set. It's said that they don't gain as much as the non-RS inlets, but there done now and i've gained what i've gained.....however much that is??

Does it feel any keener though? Mine is an RS inlet and probably not going to bother matching it......

 

[john lloyd]

with a small mirror you can see part of the RS without taking anything off.

 

[lemonnobby]

if you take the engine cover off you can see the top of the R S its on cylinder 2+3