Porsche Enthusiasts Club Forum

There is actually no wrong answer for the question you are asking (exhuast for 300ish HP). 2.5" is suitable as is the 3"

The goal is to allow your car to breathe easy, freely and with a turbo in play to keep the EGT's to a minimum. The 3" allows for a more free flowing exhuast resulting in less back pressure, better flow (out with old, so to speak) and lower EGT's by quicker evacuation. Although some will say restrictive headers can in some cases debunk the gains of a 3" ( but that is another topic for debate).

The one true tale here is that bigger is better. And if you are an A-Typical 951 owner your first roud of mods will...well...eventually just lead to another And if you are planning to increase the turbo size, you should definitely just go with 3" as you will need that anyway with anything in the 27/8 range or GT30's etc,....and the downpipe should be changed anyways. More often than not they are already partially collapsed or compromised.

Just my 2 cents...um, pence.

I agree with everything that's been said, which is why I'm waiting for one of Jons 3" exhausts also (but I probably will be having a front silencer to keep the noise down).

One thing that I wanted to say is that I thought the standard Turbo pipe was 2.5" already so I don't know why the original garage wanted to fit that to 'increase torque'????? My thoughts are maybe that's the only pipe they stock so everyone gets the same sales spiel that 2.5" will be perfect for you sir?