M400 Exhausts, what are my options?

[Iaing01]

As per subject, just wondered what is available for the M400?

Mine could probably do with being replaced this year and would like something with a bit more bark.

Iain

[Twerlie]

Iaing01 said:

As per subject, just wondered what is available for the M400?

Mine could probably do with being replaced this year and would like something with a bit more bark.

Iain

If you want quality, looks and proven results of appoximatly 40hp then get a Roush exhaust. Just make sure you upgrade the Fuel pump and wiring too.

[Ash M400]

Roush

[Biggriff]

what they said. Rousch

[RobP]

There are others, of course, and no-body afaik has done head to head comparison on the same car, so not a lot of point in the 'mines better than yours' debate. Pays yer money and takes yer choice. I went the Roush route and am very happy with it (had it over 2 yrs now). Don't bother decatting - it's just makes the car noisy (for most track days) and illegal on road, and there's no noticeable difference in power output (at least not on an M400). Roush use a very free-flowing 100 cell cat converter.

[Iaing01]

Been away on my hols for the last week and forgot all about this thread.

How much will a rousch set me back unfitted? Can they supply an uprated fuel pump and loom too?

Cheers

Iain

[MadMacMcMad]

Iaing01 said:

Been away on my hols for the last week and forgot all about this thread.

How much will a rousch set me back unfitted? Can they supply an uprated fuel pump and loom too?

Cheers

Iain

I had the Rousch system + ceramic coated + fuel pump and loom. £2500ish
I fitted. Easy to do as long as the old system comes off without a fight.

[Iaing01]

Sound good. Will I need a remap or will it be ok without?

Iain

[joust]

Iaing01 said:

Sound good. Will I need a remap or will it be ok without?
Iain

To be safe I would have a before and after rolling road session. Although mine wasn't remapped the RR session showed up some idle problems and a few other things which were fixed as part of the exhaust being fitted.

J

[Iaing01]

Joust did you get your exhaust fitted at Rouch?

Iain

[joust]

Yes. They did an excellent job.

J

[MadMacMcMad]

To take real advantage of the exhaust, you must get it mapped after.
Mine showed 385hp and 360ft lbs after with cats in place. Trevor at Roush said I could expect a 8-10hp boost without the cats.
I have removed the cats and although the extra power (if there is any) is not noticable, I did notice a slightly revier/free engine.
And what a fantastic noise!

Forgot to mention, although it is pretty obvious, mine is a GTO3, not M400.

Edited by MadMacMcMad on Tuesday 12th February 12:39

[Iaing01]

Going to give Rouch a call I think and see what they have to offer.

Iain