Replacing M8 stock plastic intake manifold with SE or S&S 55mm intake for stage

[klammer76]

I'm putting together parts for a stage 2 winter project on my 2021, 114" RGS. Would like to change out the stock plastic intake manifold with either the SE or S&S aluminum 55mm intake. I believe the stock throttle body is a 50mm? Any issue going with the 55mm intake? Lose any velocity or torque?

Thanks

[rigidthumper]

The 55 is what should have been on there from the start. No issues with tuning, and that manifold.
(not a fan of plastic manifolds)

[klammer76]

The 55 is what should have been on there from the start. No issues with tuning, and that manifold.
(not a fan of plastic manifolds)

Thank you. Not a fan either. Do you recommend one over the other or both the same?

[rigidthumper]

I'd use whichever one I could find- last I looked, everything on the planet is on back order...

[klammer76]

I'd use whichever one I could find- last I looked, everything on the planet is on back order...

So true  Thanks for the info.

[mike jesse]

Check with Fuel Moto, they offer the manifold ported as well.

[hrdtail78]

You wont loose anything, and I see actual improvements on stage 2's.  I'd suggest the 5.5 injectors as well.

[klammer76]

You wont loose anything, and I see actual improvements on stage 2's.  I'd suggest the 5.5 injectors as well.

[sandrooney]

I replaced the plastic one on my 114 Heritage with the SE just because it was plastic.

[louloupa]

the advantage of the plastic model is that it does not transmit heat from the engine.

[HogMike]

You wont loose anything, and I see actual improvements on stage 2's.  I'd suggest the 5.5 injectors as well.

Second that!

My dyno session came  in very nice with moderate performance upgrades and 124/131 engines.
Street manners very smooth, it's all about the manifold AND assorted parts for any build. IMHO