Performance Exhaust Manifolds

[poussou]

Please be carefull...I'm not going to remove the CAT..

That would be illegal and HIGHLY inresponsible....Not something i want to follow for an extra 5 HP

Instead..I WILL remove the precat (the piece of exhaust between the manifold and CAT) which seems to be fairly restrictive in the AVY engines due to the early Euro 4 specs.

I have been quoted around 80 Euros for removal and replacement, which i find quite cheap and should boost my camshafts a little.I don't expect a "check engine" cause the λ sensor will go right where its supposed to, and the adaptation values reset.

Dunno when i will have the time though...


Oh and BTW...Other exhaust tweaks i sugest for this car are

1)Manifold wrapping

2)Mid silencer replacement

3)200 cell metal catalyst

That should be sufficient i guess (dunno if diameter increase ir required..on stock anyways)

Cheers

P.S.I happened to find my "old" Denso Iridium plugs that i diched almost brand new cause i felt they where giving me misfires....Having gone a long way down the tuning road, im gonna slap thise babies in this weekend just to see how they feel now....Will let you ppl know....

[Jordan]

I'm going to get the first and second cats removed cause i want more power. I have a straight through pipe for a mid silencer on my Gti.

[poussou]

I'm going to get the first and second cats removed cause i want more power. I have a straight through pipe for a mid silencer on my Gti.

Well i already said removing the 1st CAT isnt that harmfull...

Removing the 2nd CAT though IS ANOTHER THING...

Just remember the car uses a wideband lamda sensor at the 2nd CAT and removing it wide DEFINATELY screw up the values received by the ECU.And keeping in mind this IS an e-gas vehicle, my forecast is you will probably LOSE more then you will gain....Not forgeting the "check engine light" you will probably get.....

I would hate to be right....