3 inch exhaust with a hytech 2.5 inch twin loop muffler?

Therealjj91 · Post by **Therealjj91** » Fri Jun 12, 2015 8:08 pm

What I would like to know is I want to upgrade my exhaust, I have a fujitsubo manifold which will have a 3 inch collector mod attached to 3 inch piping with a 3 inch decat. Now would the 2.5 inch hytech twin loop cause a bad restriction? I know they're meant to be high flow but would going down to 2.5 cause a negative effect on performance?

Post by **RattyMcClelland** » Fri Jun 12, 2015 8:49 pm

Yes it's restricts the corrosion properties of galvanised steel so your arches will rot.

However on my Mugen twin loop back box which was 2.25" I had that pipe cut off and modified to a 2.5" pipe to it all flow matches.

Win.

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Fri Jun 12, 2015 11:40 pm

Hytech twin loop?

Not seen them.

Therealjj91 · Post by **Therealjj91** » Sat Jun 13, 2015 2:54 am

Yeah they are 2.5 the whole way through and sorry what do you mean about my arches rotting?

Therealjj91 · Post by **Therealjj91** » Sat Jun 13, 2015 2:58 am

I couldn't figure out how to get a picture on here but it's on Google images https://www.google.co.uk/#q=hytech+twin+loop

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Sat Jun 13, 2015 7:33 am

Therealjj91 wrote:and sorry what do you mean about my arches rotting?

Ignore that bit, it has nothing to do with anything - it's just Ratty trying to be funny...

Therealjj91 · Post by **Therealjj91** » Sat Jun 13, 2015 11:43 am

So does anyone know if it's a good or bad idea? Thanks.

mercutio · Post by **mercutio** » Sat Jun 13, 2015 1:34 pm

physics says it will cause a restriction quite how noticeable it will be is something no one can tell you you will probably need a dyno to tell the difference if there is one

farlow · Post by **farlow** » Sun Jun 14, 2015 6:50 am

Actually it might be a good thing, warm gasses from the engine travel faster than cooler gasses so to speed up the flow a slight restriction toward the rear of the exhaust is a good thing. I have a reducer on the 3" system on my accord just before it splits in to the twin back boxes for this very reason.

Lude Generation

3 inch exhaust with a hytech 2.5 inch twin loop muffler?

3 inch exhaust with a hytech 2.5 inch twin loop muffler?

Re: 3 inch exhaust with a hytech 2.5 inch twin loop muffler?