I've got a G-pipe on mine: makes a lovely sound, and I had no problem passing CA smog with it on - which is logical, but may reassure you

 

Got mine (Dansk) from Perf Products

Marc

 

If you are after a great noise, no drone and some performance I can highly recommend a maxspeed primary muffler bypass, 100 cell cat pipe and exhaust tip. Looks great and sounds great with no drone. www.maxspeed-motorsports.com

Combine this with an accel racing chip from Steve (from UK on ebay) and I got a dyno proven 204kw on a certified porsche centre dyno. That's a 20kw increase for minimal outlay.
It is worth mentioning that biggest advantage of removing primary muffler rather than secondary (G-pipe) is that the primary muffler hangs at the very rear of your car so removing the weight from there is a good thing.

Hope that helps.

 

Jim,

Do those chips provide any real benefit? they are unbelievably cheap

 

In short, yes, the accellracing chips work really well in my experience.
Steve is also a really nice guy to deal with.
I have sent you a PM with some further info.

Cheers

 

This is the first time I've seen this part, and I wonder why all 964's don't have this instead of their hot air intakes

http://www.maxspeed-motorsports.com/964aip.html

 

Perhaps it could catch water while it rains.

 

Whenever I see something like that I always think "There is probably a good reason why the factory didn't design it like that."

 

True, but the factory also had to design things to fit a wider audience (plus various laws, projected cost points, different climates, etc.). Twenty years later...yes, they did a remarkable job on most of the parts. As current owners, be have the benefit of being able to "narrow" the focus of our cars to suit our needs (ie: track car), sometimes it's an improvement over the original design, other times it's just candy that we like on our car.

In this example, the Maxspeed air intake points straight up (vs. the horizontal opening of the factory part)...I hope there are drainage holes already pre-drilled at the bottom to let water out?

 

Well, they did...for the cup cars

Rain would be the only reason I can see why the production cars didn't get that snorkel

 

I imagine you would still get a better gain from a proper pod filter installation, ie, installed so filter is located just under spoiler such as the EVOMS intake kit or by just cutting the back off your factory airbox, although I always suspected this would suck too much hot air.
Obviously the pod kits with no elbow to move filter close to cold air are a waste of time a they just suck hot air.

 

So are the cup cars supposed to keep out of the rain? I don't see the logic otherwise. What about when a cup car gets washed ... that snorkel would fill with water, or worse. Perhaps it has drainage holes? Do they make a whistling sound, if so?

 

I can't speak for every owner, but generally race cars don't get washed....most people with really expensive/rare cars don't bathe their cars in water

 

Correct.

Marc

 

I'd love to see a test of the Cup snorkel vs. the stock snorkel