hi all, i currently own a 2001 vrx magna,

i am looking at installing pacemaker extractors, a new cat and muffler, i have been recommended a strait flo 2.5 inch muffler, however i know factory vrx's hav a better muffler than the stock stock 3.5 already, could anyone give tell me if the new muffler would be of benifit, and also what level of power increase will i see with the extractors?

Dude, you will get some gains if you do your whole exhaust system, try using the search button up the top, so many ppl have these 2 mods installed its not funny, just read through all the threads regarding exhausts and extractors to see if its what you really want!!

but yes you will notice the difference!!

Dude, you will get some gains if you do your whole exhaust system, try using the search button up the top, so many ppl have these 2 mods installed its not funny, just read through all the threads regarding exhausts and extractors to see if its what you really want!!

but yes you will notice the difference!!

:stoopid: wat he said i think ive replied to 5or6 of these questions in the last week
i have pacies and redback system i agree get it both done at the same time it will also be cheaper this way and yer your muffler will make a difference mine did and i have a sports

thanks for your reply, the prob is alll the info related to exhaust mods for standard 3.5s, just want to know if the vrx muffler is sufficient to run with extractors or whether it would benifit from a new muffler. cheers:D

If you upgrade the exhaust but leave the muffler standard your exhaust will have to reduce from a 2.5" piping (the recommended "upgrade" from the factory ~2.25" piping) to fit the 2.25" inlet of the standard VRX rear muffler.

Not ideal - but I can't see it making much difference. General consensus is, if you're going to upgrade your exhaust, you might as well do it properly the first time.

thanks sypher, did you have a 2.5 inch muffler installed?

thanks sypher, did you have a 2.5 inch muffler installed?

Redback system utilises a 2.5" muffler. Speaking from experience, in retrospect I kinda wished I had spend a little extra and got a stainless steel muffler as opposed to the redback which is mild steel, not that it matters now because my entire exhaust will need to be upgraded anyway. Stainless will last longer (ie: you should never need to replace it) and sound better.

at the moment im looking at pacies, new cat and muffler, but standard piping, should see some gains tho hey

what sort of kilowatt gain will i see with extractors?

at the moment im looking at pacies, new cat and muffler, but standard piping, should see some gains tho hey

Upgrading from standard cast headers to pacemaker extractors, and a better straight thru muffler (2.5" inlet) will deliver improvements in power delivery without a doubt. The jury is still out on whether or not an upgraded catalytic converter will make much difference in a lightly modded N/A application.

Personally I'd save the $250 odd that you would spend on an aftermarket cat, and upgrade it if and when you replace the cat back piping.

what sort of kilowatt gain will i see with extractors?

Bugger all. I wouldn't expect more than a 2kW gain from extractors alone. Particularly because Pacemaker and RPW headers with their long primary pipes are designed to improve low/mid range torque at the expense of top end power.

Having said that - I don't know of anyone who has done before and after dyno runs when performing exhaust upgrades, but most people report that the car feels like "revs more freely".

what sort of kilowatt gain will i see with extractors?


Mate, you are best to upgrade it all, have no stock pipes, get the full exhaust system, stainless steel preferably, then upgrade the cat converter to a high flow cat, then replace the stock extractors with aftermarket ones!! you will see some gains, cant really give u an exact in KW as it varys although u will notice heaps more grunt and also have a nice roar to it!!!

what about air intake modification, whats the cheapest/best way to see gains in that area?
:D

thanks for your reply, the prob is alll the info related to exhaust mods for standard 3.5s, just want to know if the vrx muffler is sufficient to run with extractors or whether it would benifit from a new muffler. cheers:D

i have a 2000 vrx.

i got noticable gains from my 2.5" reback zorst. highly recommend it

what about air intake modification, whats the cheapest/best way to see gains in that area?
:D


Im tipping yours is just stock atm??? with the air intake mods, the best would be to get yourself a K&N pod filter and then install a DIY CAI!!!

type DIY CAI in the search button up the top and you will see what i mean!!

:thumbsup:

what about air intake modification, whats the cheapest/best way to see gains in that area?
:D
Hundreds of threads on this too man, do a search. You'll find lots of different ways to make a CAI (Cold Air Intake) yourself. The most common probably being to run some pipe from the stock airbox/snorkel to the front of the car somewhere with a K&N panel filter.

to sum up, if i put pacies, stick with current pipe, change cat,and add 2.5 muffler on a vrx, all up, i should see a gain?

Yeh dude you will see gains, although to what extent entirely depends on what you choose to go with, like quality of the products!!

good luck!

Yeh dude you will see gains, although to what extent entirely depends on what you choose to go with, like quality of the products!!

good luck!
fair call, its pace makers and a berkley exhaust.

to sum up, if i put pacies, stick with current pipe, change cat,and add 2.5 muffler on a vrx, all up, i should see a gain?

dude....your details show you have an auto. i have a auto too and with pacies and CAI with the factory sports exhaust, it only gave me 116kw at the treads, which is around 160 at the fly(may have been with a/c on if it makes a difference) those autos suck a fair bit out. BB would probably be right for the low kilowatt gain from extractors, but with other mods may be worth it.

Just get a 2.5" muffler either a bolt on or welded on one, 3.5s already have 2.5" piping already, you paying extra for something you dont need, piping that is.

Just get a 2.5" muffler either a bolt on or welded on one, 3.5s already have 2.5" piping already, you paying extra for something you dont need, piping that is.

I believe that the piping goes from 2.25 - 2.5" along the way! Don't quote me on this.. But I think, wouldnt it be better to just get 2.5" piping all the way anyways.. that way you actually know you have 2.5" piping the whole way!

SuFz :rant:

3.5's do not have 2.5" piping. Not even the Ralliart got 2.5" piping, it got like 2.35, 2.3 in parts.

3.5's do not have 2.5" piping. Not even the Ralliart got 2.5" piping, it got like 2.35, 2.3 in parts.


They'd be the press bends, regular N/A cars dont need mandral bent exhausts

I've got Pacemakers fitted and a 2.5" cat back exhaust system and I've noticed more gain in the mid-range up and the nicest grumble at idle. The guy also checked out my cat when I asked about a highflow cat and mine already has one.

Ralliart Headers have 1 5/8" Primary Pipes and the Connecting Pipe is 2 1/4" with 2 Flexi Sections.

They'd be the press bends, regular N/A cars dont need mandral bent exhausts
MMAL state that their system is 60.5mm (~2.4') and yes, it varies slightly. As far as the bends are concerned, they are near mandrel.

As far as exhaust upgrades go. If you have a VR-X, get extractors and make sure your cat isn't dying. If it is, get a metalcat. The stock system isn't bad and as far as piping is concerned, Jason has recorded 294kW (FW) with either 2.5' or stock piping.

make sure your cat isn't dying. If it is, advertise, someone might still pick it up
http://pictureserver.funnyjunk.com/pics2/freecat.jpg

If it is, get a metalcat.
Like this one. Not as easy to run over
http://us.st11.yimg.com/us.st.yimg.com/I/cleanairgardening_1909_3445241