i know this is probably covered somewhere but after a bit of a look i couln't find anything. I am looking to hear from those that have changed their VRX or SPORTS rear muffler for an aftermarket one. did you notice any gains from doing such. i did a Dyno this weekend and got aprrox 115fwkw...which is around 154kw at the flywheel. considering they alledgedly come out with 163kw at the flywheel, and i have CAI, K&N and extractors i thought maybe the muffler might be a problem????

Why is this in the car audio section? :think:

But to answer your question, the muffler will make a small difference, as will extractors but nothing life shattering.

Moved :)

but nothing light shattering.

How do you shatter light?

How do you shatter light?


with a light shatterer.... duh lol :P

Moved :)

yeh i was wondering where i put it...ta

How do you shatter light?

take one light bulb and gently tap with a sledge hammer. *sigh*

i know this is probably covered somewhere but after a bit of a look i couln't find anything. I am looking to hear from those that have changed their VRX or SPORTS rear muffler for an aftermarket one. did you notice any gains from doing such. i did a Dyno this weekend and got aprrox 115fwkw...which is around 154kw at the flywheel. considering they alledgedly come out with 163kw at the flywheel, and i have CAI, K&N and extractors i thought maybe the muffler might be a problem????

You may be running lean or rich.. Get that checked out.. You've got all breathing mods so.. it may be running a touch lean.. nothing to scream about.. but its a possibility..

Malpassi Fuel Pressure Regulator.. I've never touched one.. I've seen them installed.. I've seen people swear by them and others that say pfft.. it just f**ked things up! But hey.. I reckon maybe investing in one of these wouldnt be a bad idea.. Not EXTREMELY expensive either.. $200 or so.. I believe!

SuFz :rant:

Dyno this weekend and got aprrox 115fwkw...which is around 154kw at the flywheel. considering they alledgedly come out with 163kw at the flywheel, and i have CAI, K&N and extractors i thought maybe the muffler might be a problem????




we hav 2 ralliart magna both manual on our dyno day last yr 1 has an aftermarket exhaust system and the other is stocko....stocko runned 180hp@fw=135kw while the other runned 160hp@fw=120kw. i guess not all same kind was built to run d same quality.

we hav 2 ralliart magna both manual on our dyno day last yr 1 has an aftermarket exhaust system and the other is stocko....stocko runned 180hp@fw=135kw while the other runned 160hp@fw=120kw. i guess not all same kind was built to run d same quality.

A Ralliart with an aftermarket exhaust system pulling 120kW @ the wheels? :nuts: Maybe the exhaust system has holes in it.

we hav 2 ralliart magna both manual on our dyno day last yr 1 has an aftermarket exhaust system and the other is stocko....stocko runned 180hp@fw=135kw while the other runned 160hp@fw=120kw. i guess not all same kind was built to run d same quality.


a ralliart losing power with an aftermarket exhaust, that shouldn't happen, did the torque increase?

a ralliart losing power with an aftermarket exhaust, that shouldn't happen, did the torque increase?
If power has decreased then torque will too.