964 Carrera 4 - 1990 exhaust adv

[baronvonhorne]

Hello,

A friend of mine is considering the Cat bypass on his 1990 Carrera 4.

It costs around £1000 and is supposed to increase BHP and of course the sound.

Anyone done this or know of anyone who has?

Any advice would be appreciated.

Tks,
BVH

[leosayer]

My car had this done before I bought it, sounds great but not sure if there are any hp gains.

£1000 is very steep for just a by-pass, as a pipe only costs around £250.

[James s]

My 89 car had this mod. It sounded fantastic, particarly going through 3,500 rpm when the note changed dramatically. DIfficult to tell with the power though I have driven a few since and they felt considerably less pokey, but as all were 100k plus cars its difficult to put this down to the exhaust.

[domster]

You could have a cat bypass, secondary silencer bypass (j-pipe), filter and rolling road rechip for approx 700 GBP.

Just the j-pipe sounds great and only costs 100 GBP.

1000 GBP seems extremely pricey.

[MOD500]

Don't know about non turbo cars, but from memory some of the Rennlisters noticed a decrease in power with the cat by pass on turbos.

[johnfm]

£1000!!! Is it a gold cat bypass with diamond encrusted brackets!!!

Who has quoted this - let us know so we can steer clear.

[ian964]

£1000 is way too much just for the cat bypass, even fitted. The pipe comes in about £250, and it's an hour or so labour to fit. I've got one on my C2, together with a primary muffler bypass (aka Cup pipe) - sounds great, not sure there's any significant power gain.

[Melv]

Chr*st!! Who's charging a grand for this? Is it gold plated like the McLaren F1 cats???

Mel

[baronvonhorne]

I guess I should find out if they were doing more than just the bypass - the company is MR Performance Cars in Salisbury and I hear they have a very good rep.

Thanks for the feedback though!

[baronvonhorne]

Just found out this price is for a cat bypass and complete stainless steel replacement system.

Does this make any more sense for £1000?

Cheers,
BVH

[domster]

No, because you can ditch the backbox for an 80GBP j-pipe.

[computamedic]

It doesn't sound so bad if it's fitted. I paid just under £200 for my cat bypass and around £700 for my Fabspeed stainless system. Fitting can be a few hours so I reckon it's not a bad deal.

Regards


Dave

[porktastic]

computamedic said:

... my Fabspeed stainless system...

Hi computamedic,

Just got myself a Fabspeed dual outlet system for my 964 C4, do you know who sells the best n/s bumber part to accomodate the extra outlet?