[Fabio]

Hi

i'm seriously thinking of getting a JCW 4-2-1 Manifold for my GP. What are the main advantages of the 4-2-1 manifold???. I know that you can get the GTT manifold and its ment to be better and cheaper but i'd like to stick with JCW products.

Thanks

http://www.johncooper.co.uk/JohnCoop...FExhaust+Kits/

4-2-1 Sports Manifold + Intermediate CAT Pipe (Cooper S)
JCM504
Increases performance by approx. 10bhp. High quality Stainless Steel 4-2-1 Sports Manifold, Intermediate Pipe with high flow CAT, lambda leads & gaskets. Compatible with the Rear Silencer below (JCM185A/B) and the Cooper S Works Rear Silencer (not suitable for factory fitted JCW silencer).

[PmP]

Quote: Originally Posted by Fabio (original)

Hi

i'm seriously thinking of getting a JCW 4-2-1 Manifold for my GP. What are the main advantages of the 4-2-1 manifold???. I know that you can get the GTT manifold and its ment to be better and cheaper but i'd like to stick with JCW products.

Thanks

http://www.johncooper.co.uk/JohnCoop...FExhaust+Kits/

4-2-1 Sports Manifold + Intermediate CAT Pipe (Cooper S)
JCM504
Increases performance by approx. 10bhp. High quality Stainless Steel 4-2-1 Sports Manifold, Intermediate Pipe with high flow CAT, lambda leads & gaskets. Compatible with the Rear Silencer below (JCM185A/B) and the Cooper S Works Rear Silencer (not suitable for factory fitted JCW silencer).

Out of stock at minute mate according to website.

Ring Cooper garages and ask Paul Cooper. Think its likely to be louder, and freer flowing due to the cat sitting flatter, or so I was told when I was thinking about this before.

Just wondering tho, will it work with GP exhaust? "(not suitable for factory fitted JCW silencer)."

Because unlike the cat back works exhaust on my S and im sure the one that was on your S, the GP exhaust is one piece! These were dealer fit parts, the GP im sure has factory fit exhaust that comes in one bit.

So you'll either have to butcher your GP exhaust or buy a back box section as well.

If you are go, for the motorsport backbox, rather than the road one.

[Fabio]

Quote: Originally Posted by PmP (original)

Out of stock at minute mate according to website.

Ring Cooper garages and ask Paul Cooper. Think its likely to be louder, and freer flowing due to the cat sitting flatter, or so I was told when I was thinking about this before.

Just wondering tho, will it work with GP exhaust? "(not suitable for factory fitted JCW silencer)."

Because unlike the cat back works exhaust on my S and im sure the one that was on your S, the GP exhaust is one piece! These were dealer fit parts, the GP im sure has factory fit exhaust that comes in one bit.

So you'll either have to butcher your GP exhaust or buy a back box section as well.

If you are go, for the motorsport backbox, rather than the road one.

I thought that as well when i read the description, i'll give them a call during the week and see what they saw. I dont really want to start butchering my exhaust, but a motorsprt JCW exhasut would be great for short journeys but you'd probaly need ear plugs for long journeys

[PmP]

Quote: Originally Posted by Fabio (original)

I thought that as well when i read the description, i'll give them a call during the week and see what they saw. I dont really want to start butchering my exhaust, but a motorsprt JCW exhasut would be great for short journeys but you'd probaly need ear plugs for long journeys

Definitely need ear plugs in the GP, mine with the motorsport mid section, with back seats down and parcel shelf out is rather loud. And my back box is the road version.

[Fabio]

Quote: Originally Posted by PmP (original)

Definitely need ear plugs in the GP, mine with the motorsport mid section, with back seats down and parcel shelf out is rather loud. And my back box is the road version.

i'd definitley need a new rear box, its not worth it

option could be to get the GTT manifold, its not too bad at about 450 Sterling + VAT but i wonder will my exhaust be okay for that?

[PmP]

Quote: Originally Posted by Fabio (original)

i'd definitley need a new rear box, its not worth it

option could be to get the GTT manifold, its not too bad at about 450 Sterling + VAT but i wonder will my exhaust be okay for that?

Would say so, you could always just go for the JCW motorsport cat-back system if your after a freer flowing system and more power for the track? Would be freer flowing. And jack the flap at back of airbox open. How about a larger intercooler?

I've a GRS sitting here and cant decide whether to fit it or sell it!

[LMB]

Quote: Originally Posted by PmP (original)

Definitely need ear plugs in the GP, mine with the motorsport mid section, with back seats down and parcel shelf out is rather loud. And my back box is the road version.

I thought about changing the manifold but I thought it'd be too load.