3 inch exhaust + Meth..any thoughts?

[momento1]

Hi guys..

long time no post.
Just wondering if anyone has been successful in fitting a 3 inch twin exhaust right through? and possibly any pics of it done?
Currently on my S4 where the twin AWE downpipes joins with the twin ssautochrome exhaust it is only 2 inch diameter. Obviously this is a slight restriction, but how much of a restriction when compared to a twin 3inch system for example? alot or is it just a slight gain?

also im strongly considering the Vast Meth injection as we are starting to get hot days again and we are only coming into the middle of Spring over here.
Can any who has used the Vast kit, or any Meth kit, recommend the correct ratio of mixture with water to achieve around 110 octane rating when paired with 93 oct fuel.
Thanks in advance for your feedback

[ThirdStrike]

i have 3 inch downpipes that run all the way back to a exhaust linked 3 inch (no cats). u will see a good gain.
nothing against vast but they arent the only company that distributes water/meth.
look at snowperformance , devilsown, and aquamist also.
your water/meth mixtures are always going to be 50/50.
fyi with a pure methanol / distilled water mixture and the tap run as close to the throttle body as possible you will achieve 110+ easy. i was told from a snow performance person its around 120 oct ... but it all depends on where the injection happens.. the farther from the TB the less octane gain u see. then it just goes for lower iat's

[momento1]

yeah i have been looking into a few meth kits... mainly snow and devils own...
but isnt Vast's kit is basically a devilsown just re-labelled??

have you got pics of your exhaust with 3 inch right through? reason i ask is because i know the ssautochrome, and even the AWE Twin, have a couple twists and turns towards the rear diff and im wondering how twin 3 inchs would fit in that area...

thanks for your reply

[JMTx86]

yeah i have been looking into a few meth kits... mainly snow and devils own...
but isnt Vast's kit is basically a devilsown just re-labelled??

Of course not, Its completely different.

[momento1]

Of course not, Its completely different.

well thats just what a few people have been mentioning on this forum.. so can only go by what the majority states

[ThirdStrike]

hes being sarcastic.. its the same.

[momento1]

hes being sarcastic.. its the same.

lol... yeah i figured he was.....

[Ianxcom]

I dont wanna thread jack or anything but i also dont wanna make a new thread for this question.

What is the size of the stock exhaust? 2? 2.5?

[Ianxcom]

I dont wanna thread jack or anything but i also dont wanna make a new thread for this question.

What is the size of the stock exhaust? 2? 2.5?

?>?

[AielloS4]

good luck trying to fit 3" dual on..even 2.5" dual is a PIA I couldnt imagine 3" dual.