Guest

I need help with deciding on which pipe is better. Stillen or Cattman? I have heard that Stillen hisses, Cattman does not fit right and does hiss? What is the difference between jethot and SS? There is a $115 difference between the two. How much does the Stillen pipe cost? Is it worth getting the RT cat? This is my first Nissan and I love it and I want to make it better.
1st2Kgxe

Pepo

I have a Stillen YPipe, there's a new generation and it's pretty quiet, it does hisses but it's only when you floor it down and ranges from 4-6000 RPM, but is a cool sound no problem. The CAI is much louder. Im working with the RT cat, installed but have to go back to the stock one because didn't have the correct gaskets. The RT Cat is 2 1/2 inch in dia., the stock one is 2 3/4, although the cat is High Flow I dont know if the 1/4 in. afects. I sent several EMails to the experts to have their opinion. If everything goes ok I'll post it in the forum for the benefit of everybody.

mhgsx

The RT Cat is 2 1/2 inch in dia., the stock one is 2 3/4, although the cat is High Flow I dont know if the 1/4 in. afects. I sent several EMails to the experts to have their opinion.

Are you saying the opening to the OE cat is 2 3/4"???? If not, and since you've had it in your hands, what's the inner diameter to the input and output of the cat??? I NEED to know.

Also, something to consider about aftermarket cats. There's a reason why they're so much cheaper than OE. They don't have the engineering behind them. Consider that despite ever-tightening emmisions regulations, manufacturers are squeezing ever more HP out of smaller engines. I highly doubt changing the cat to a 'high performance' cat is gonna do anything for you. There are a lot of respected tuners out there who will tell you the same thing.