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Merli, I could probably throw a few more names up, forgot to mention Nismo, BeeR, ATTKD, HRD etc...

Prices for GT-R sports cats can range from 40,000Yen to as high as 90,000Yen, which isn't cheap. I mentioned HRD because they are the only one I know who make up to 100mm Sports Cats...everyone else make either 70, 76.5, 80 and a few 90. So perhaps it maybe better to get one custom made if you want 4", but seriously I don't think you need to go that big.

I too have been looking in to this.  

 

Up until recently every 1 I spoke to in AUS said they cannot get 3.5" cats.

 

Exhaust Technology have recently told me they are now able to get 3.5" Cats and they definately make a huge difference when making upwards of 300rwkw and over.

 

They are $380 each.

 

They have a www site that is listed on the quote they gave me but it doesn't appear to be up at the moment? Maybe its a type on the receipt?!?

 

www.exhausttechnology.com.au

Drop the .au

www.exhausttechnology.com

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