Pre Cats

[MacRS200]

Read now in a few threads about removal of the pre cats.

Ok understand the objective to be improved gas flow, better breathing = more power :D

Does this not have a negative effect on emissions

Also how about valve timing, surely reduced back pressure means the exhaust gasses come out earlier, is there not a danger of burning exhaust valves Or I am just being thick

[Mr Morse]

Read now in a few threads about removal of the pre cats.

Ok understand the objective to be improved gas flow, better breathing = more power  :D

Does this not have a negative effect on emissions 

Also how about valve timing, surely reduced back pressure means the exhaust gasses come out earlier, is there not a danger of burning exhaust valves  Or I am just being thick 

←

The most restrctive part of a standard OEM exhaust is the manifold (or header pipes in US speak), thereafter the pre cats and back box.

Yes, there will be a negative effect on emissions, but tree-huggers don't tend to be petrolheads. That's up to your conscience

With a simple ECU reset the engine is "told" that there is something different happening and will respond accordingly.

[MacRS200]

Read now in a few threads about removal of the pre cats.

Ok understand the objective to be improved gas flow, better breathing = more power  :D

Does this not have a negative effect on emissions 

Also how about valve timing, surely reduced back pressure means the exhaust gasses come out earlier, is there not a danger of burning exhaust valves  Or I am just being thick 

←

The most restrctive part of a standard OEM exhaust is the manifold (or header pipes in US speak), thereafter the pre cats and back box.

Yes, there will be a negative effect on emissions, but tree-huggers don't tend to be petrolheads. That's up to your conscience

With a simple ECU reset the engine is "told" that there is something different happening and will respond accordingly.

←

On the emissions was more about when Mr MOT inserts his probe in the rear orifice of the vehicle rather than the environmental effects. If I was worried about them I would run about in a Smart not an IS that does 23 to the gallon

[Monster-Mat]

if ther main cat is got upto temp before the MOT then you should have no problem.

upto temp, means a good run!!

there are a few traders on here that do now sell aftermarket manifolds with no cats fitted, the only one i have Physically seen is the one from Prolex UK

[MacRS200]

if ther main cat is got upto temp before the MOT then you should have no problem.

upto temp, means a good run!!

there are a few traders on here that do now sell aftermarket manifolds with no cats fitted, the only one i have Physically seen is the one from Prolex UK

←

Thanks Mat

What I wanted to know. Was thinking of an induction kit and while I got the area clear doing the manifold as well.

Wanted s/c, the missus wants a new car (Audi ) but talked her into my IS instead then I could get an Altezza. But would miss the sweet sound of the six being revved so half way house is induction kit (prob off Scott) and new manifold while I make my mind up. Then if Altezza comes around can move kit over there!

[Monster-Mat]

Here to help.... ;)

[Mr Morse]

I'm planning on getting one of these

XERD

when I go to Houston later this year. Dynoed at 15.5 bhp increase

[Monster-Mat]

I'm planning on getting one of these

XERD

when I go to Houston later this year. Dynoed at 15.5 bhp increase

←

it will need modifying to fit a right hand drive car, im a little scepticle that the header alone can give 15.5hp, but proof of the pudding and all that

[Dave-Ellen]

As Mat says we do a performance manifold for the IS. This is in stock and is ready to ship.

We are also working on a induction kit for the N/A IS200.

Should be ready in 3/4 weeks will be diifferent from those currently on the market and competitively priced.

I also have a OEM manifold decatted by Tdi which can be yours for £***

[Monster-Mat]

no selling in normal posts.....

[Mr Morse]

I'm planning on getting one of these

XERD

when I go to Houston later this year. Dynoed at 15.5 bhp increase

←

it will need modifying to fit a right hand drive car, im a little scepticle that the header alone can give 15.5hp, but proof of the pudding and all that

←

I checked with them already, they said OK for RHD. Fargo has same on his IS300 and said it fitted no problem, unlike some of the other US brands

[Monster-Mat]

ah, ok........

[MacRS200]

I'm planning on getting one of these

XERD

when I go to Houston later this year. Dynoed at 15.5 bhp increase

←

Very nice.

But I'm Is200

[Mr Morse]

You have a lot more choice with manifolds for the IS200 in the UK, as it's not sold in the US. Mr ProLex and Mr Altezza to name a couple. I haven't come across anything available in the UK for the IS300

[MacRS200]

You have a lot more choice with manifolds for the IS200 in the UK, as it's not sold in the US. Mr ProLex and Mr Altezza to name a couple. I haven't come across anything available in the UK for the IS300

←

Thank you Mr Morse. I've finally gone Gold and will be contacting the esteemed gentlemen mentioned above first for the afore mentioned bits :D