crg53

All 964 exhaust pieces have female ends and are fitted together with a "doughnut" and matching clamp.
There are three of them, cat to primary, primary to secondary and secondary to tail pipe.

mdsarch

Thanks for all the replies, it certainly helped guide my plan.

Step 1: G pipe - just ordered from FVD with a Rennlist discount.

Step 2: drive the car on street and track to evaluate

Step 3: if I feel I want more, cat bypass or sport cat + DME update

Can't wait!

911Jetta

You track, you know you are going to keep the car for a while... Go to step #3.

The cat really wakes up the car, and it's only a slight volume increase after you've install a bypass muffler. No cat also means a lot less heat in the engine compartment too.

A drilled airbox adds drama too.

koenig_roland

I`m a little bit surprised by the result of this "evaluation". I thought, the performance-crowd will vote for a full race-header system...

I thought, a good performance exhaust will gain some torque and so, some power...?! Not worth the (big) money it will cost?
I have cup-pipe and 200cell cat on the Qpe. It sounds quite good, but i dream for a full race exhaust with cat and heat.

Jjm4life

I love how my fabspeed header muffler kit sounds. Even sitting in traffic i haven't grown tired of how it sounds. Drone isn't an issue either, i do have an intake too. Might help

mike9186

I have a cat bypass, cup pipe and Steve Wong chip (with Cat Bypass option). The Cat bypass really helps with lower end torque and gives the car a nice throaty sound. Sound levels are not an issue at all unless you are redlining 1-2-3 shifts in a residential area.

mdsarch

You are probably right! I just installed the "G Pipe" and the sound is a low burble at idle and progressively louder upon acceleration. To be honest, I didn't expect the low grumble. I didn't notice any power increase but have only had it on the street. A certain benefit is reducing the weight of the secondary muffler. Now to jump to step #3!

vagluv

Last night i heard Vandit's car. He is all stock into a g pipe, and it sounded good. I would imagine a cat bypass, oem primary, and g pipe would sound very good! A lower note than the setup i have.

fasterlaster

After mulling over options for my 89, I ended up putting on a g-pipe. Very happy with the sound, both at idle and under load. The only difference I've noticed so far in engine operation is the very mild hunting at idle likely due to the reduction of back pressure. Certain nothing that makes it worth putting that big secondary back on.