GT 4.2 exhaust mod... Do-able?

[rivarama]

I just stumbled upon that post on ML, highlighting an interest mod on the QP, and was wondering whether that mod would also doable on a GT...

http://www.maseratilife.com/forums/quattroporte/62737-quattroporte-exhaust.html

The videos sound pretty cool... Would be interested to get your views,

Thanks

 

[Wack61]

The thing is somebody was brave enough to be the guinea pig, they must have been prepared to pay the cost of Larini or tuba so thought I'll give it a go.

If you were thinking of trying it the most it's going to cost is a new exhaust , the least , just weld them back in

 

[rivarama]

That is indeed very brave. There are used 4.2L back boxes on eBay for £300 or so... May be worth a punt?

 

[Contigo]

Had mine done, X pipe (although might try an H to compare) and secondary cat delete and it sounds much nicer at high revs. Idle is pretty much the same.

The problem with gutting the back boxes is that it make a tinny sound.

 

[StuartW]

Agreed about the gutted back boxes, they can sound worse but I guess it depends from car to car, I've not heard them done on a GT so might be worth a try

 

[rivarama]

Isn't what the quicksilver backboxes are? Slightly bigger but totally empty boxes?

 

[Contigo]

Isn't what the quicksilver backboxes are? Slightly bigger but totally empty boxes?

Nope not totally empty, like Larini there is still "some" soundproofing and acoustic enhancement properties.

 

[Yorkshire-Trident]

Had mine done, X pipe (although might try an H to compare) and secondary cat delete and it sounds much nicer at high revs. Idle is pretty much the same.

Phil, did you go for a larini de-cat, or is Benny's contact able to knock something up?

 

[Contigo]

Phil, did you go for a larini de-cat, or is Benny's contact able to knock something up?

Custom X pipe and secondary cat removal.

 

[AndyG]

Primary de-cat, x pipe and Valved rear boxes works for me

Sent from my iPad using Tapatalk

 

[Contigo]

Here's my QP before and after.

[video=youtube;9b3M71tiIJM]https://www.youtube.com/watch?v=9b3M71tiIJM[/video]

 

[ChrisQP09]

got a warm fuzzy feeling with this

 

[Contigo]

£180 lol cannot spend money better than that!!!

 

[ChrisQP09]

I would agree with you. Are you selling your QP man?

 

[Contigo]

It's not advertised but if someone wants it then it is theirs. I have too many cars!

 

[StuartW]

Good work Phil

 

[Contigo]

Cheers Stuart, it has the right balance. I don't think the QP should be mental loud, it is quiet on idle but a quick blip (these engines rev so quickly) and it really sings. Watching peoples faces at traffic lights when you blip it is funny as they jump back in fright.

As I am sure you know with your bonkers sounding GTS.

 

[StuartW]

Cheers Stuart, it has the right balance. I don't think the QP should be mental loud, it is quiet on idle but a quick blip (these engines rev so quickly) and it really sings. Watching peoples faces at traffic lights when you blip it is funny as they jump back in fright.

As I am sure you know with your bonkers sounding GTS.

Indeed, I'm still waiting for someone to drop their shopping when I start it up at the supermarket! But yes, I think yours has just the right balance & not too screamy