vinnylondon

vinnylondon

Member
I'm looking to put a decat down pipes on my L322 4.2 supercharged but having difficulty sourcing them, there is plenty of 4.4's out there, so my question is do the 4.4 down pipes fit the 4.2.

I thank you in advance
 
vinnylondon said:
I'm looking to put a decat down pipes on my L322 4.2 supercharged but having difficulty sourcing them, there is plenty of 4.4's out there, so my question is do the 4.4 down pipes fit the 4.2.

I thank you in advance
Click to expand...
That would be illegal.
 
Why decat? - less restricted exhaust?? o_O
If you take it to a specialist like LongLife or someone, they fabricate custom exhausts and can fit road legal high-flow cats and tap your sensors in so it still works. Can email them and they’ll give you a quote.
 
If it’s ragged it may produce a lot less than new. Depends how well maintained it is superchargers always need rebuilding to produce top power. Maybe he needs an excuse to go see the pretty lady at the petrol station, or a midlife crisis? I should be due for another one of them. Roof rack and tree bars mine will be :rolleyes::D
 
It'd have to be pretty well shafted to feel down on power with a starting point of 400bhp or so.
Mines the n/a ajv8 and goes like the clappers.
I used to want an s/c, nor now, I think it'd be borderline dangerous in such a heavy lump.
 
With most UK roads speed-restricted and our motorways becoming a set of interconnected "Variable Speed Limit" money grabbing ventures run by UKplc I question the need for any increase in "Oomph". :D
 
Wazzajnr said:
It'd have to be pretty well shafted to feel down on power with a starting point of 400bhp or so.
Mines the n/a ajv8 and goes like the clappers.
I used to want an s/c, nor now, I think it'd be borderline dangerous in such a heavy lump.
Click to expand...
My thoughts exactly.:D
 
I do :oops:... I confess.

But it works! :D;)
Think you favourite was me removing the acoustic shielding to help with hotstart, static was a better idea :)
 
If you want more pull from the SC fit an under pulley.

As mentioned the O2 sensors form part of the EMS so without cats it will default to reduced power yes you can fool the system but you'll have to undo it every year for the MOT.

My 4.2 SC goes like the clappers. Have been considering performance enhancements but my first stop was vented and cross drilled brakes. stopping is more important on a heavy lump with an SC that goes like stink
 
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