In late 2006 my passion for Porsche that had been kindled by owning a boxster lead me to search for a 911. In February 2007 I found a lovely, well used 964 carrera 2 coupe in GP white and embarked on a new adventure. This running report is about my 964 that would be used for high days, holidays and track days and be a 'project car'. It wouldn't matter if it spent time waiting for things to be fixed as it wouldn't be used as a daily driver.

Sunday, 28 November 2010

Exhaust Modfication (Sep 08)

While waiting for the bodywork to be completed I got the opportunity to buy a nearly new cup bypass pipe for the exhaust (£80 vs the new price of about £200). This replaces the standard primary silencer. Having done some research on the various 964 exhaust modifcations available I decided that this one provides the best bang for buck.

Firstly, as shown in the pic below, it gives a significant weight saving over the standard primary.



And most importantly the weight is shed in the best place - the middle of the car. Below is a shot of the bypass in place that shows where the inlet connects to the cat:



The second reason for choosing a cup bypass is that it supposedly releases a few more horses from the engine. How many seems to be a point of debate. Somewhere between 5 and 15 extra bhp covers the range of most people's claims.

The final reason for the change was to tune up the noise the exhaust makes. Give it a bit more growl but not so much that I would fail noise tests at tackdays. Have a look/listen at the clip below and see what you think.

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