[billrogers]

I am due to replace the exhaust system on my 2000 G13 Auto Jimny, my thoughts are to use the stock manifold and engine pipe, then fit a new
2" cat and system. (pensioner upgrade)
OK.. will this be any benefit or should I also go for headers?
Regards Bill

Stiock Standard
2000 G13BB
Auto
Nudge, D Lights
Cooper 205/70-15 s

[laurie]

i would go for headers as they give a small benefit to power, torque and
economy all day every day with no maintenance.

[lordviper556]

i got a set of extractors and a full 2" system on mine (its an m13a) and it was deff worth it. i would deff get extractors if you have the money.

[alien]

do the whole system from the engine to the tip in one hit, anything else is pointless.

also, 1.75" is better suited to jimny 1300 than a 2" - but 2" would be the max you'd want to fit.

[dm90]

alien wrote:

do the whole system from the engine to the tip in one hit, anything else is pointless.

also, 1.75" is better suited to jimny 1300 than a 2" - but 2" would be the max you'd want to fit.

what makes yu say that???

[Benz]

dm90 wrote:

alien wrote:

do the whole system from the engine to the tip in one hit, anything else is pointless.

also, 1.75" is better suited to jimny 1300 than a 2" - but 2" would be the max you'd want to fit.

what makes yu say that???

yeah i would also like to know

i know someone who got 2.5" on a jimny and he said it was far too big

what is the standard size?

[dm90]

most people get 2 inch

and thats what i was gonna get but if alien and some exhaust experts can convince me other wise then so be it

[alien]

exhaust guys i spoke to said 1.5" on standard headers or 1.75" if aftermarket/performance headers. 2" for 1.6l.

that and you dont want it to be too loud which attracts attention and stops you hearing what your spotter is saying offroad.

[Birdman1985]

It may also have to do with the exhaust flow. You don't want there to be too much free flowing exhaust gas. It is meant to have a little pressure behind it.

[JrZook]

Birdman1985 wrote:

It may also have to do with the exhaust flow. You don't want there to be too much free flowing exhaust gas. It is meant to have a little pressure behind it.

Something like that. You want to maintain the maximum gas flow velocity over the working rev range without restriction. Going from 1.75 to 2" the difference will be quite insignificant. Going from stock to a 1.75 or 2" system with high flow cat, muffler and headers will provide you with a noticeable difference in power and power delivery.

Dan