These headers / 200 cell sport cats fit:
> All the 997 2nd generation including the GTS
A catalytic converter works on the principle of creating sufficient heat within the exhaust for it to work like an oven. This sets the catalysers to work to "clean" the exhaust gases before releasing them into the environment. Since the 1st generation 987 and this 2nd generation 997, the cats have moved further up the exhaust line to have more heat. The headers and cats come in one piece per bank of 3 cylinders. So one pair per car. Originally on the 2nd generation 997 there were 2 cats on each side. Our version improves both the flow through the headers, and the performance of the cats. One of the results of this is an improvement in the sound. Of all the cars in the history of Porsche, this one makes the least sound, which is a shame as the sound it makes is fabulous. If you fit these headers/cats along with our system with valves, you will have a beautiful sound with the valves closed that will suit all driving situations. With the valves open, you will have a car with a sound verging on racing when you accelerate. This is the most beautiful of the air-cooled Porsche, but that's just my opinion! Read on and you'll see what fellow Porschists, who have already taken the plunge, have to say about this exhaust.
Our range also includes:
> A standard 400 cell catalysed version - (Reference : SCA 997-2 1 1) to order
Our exhausts all fit onto the original interfaces. By this we mean their entry, their outlet and their size are the same as those of the original part. They can therefore be fitted in replacement of the original part without requiring any modification.
These cats fit under the car between the engine and the transverse muffler. We recommend that you unplug the 2 Lambda probes before dismantling the cats, then remove them once the cats are no longer fitted to the car.
On average, it should take about 3 hours to fit them including the time taken to dismount the original exhaust. It will be faster if the exhaust you're removing is in good condition, just as it may take longer if the reverse is true.
You will need a car hoist for the job. It isn't easy to retrieve the Lambda probes so be prepared to buy new ones or have some already to hand.
Remember that the bolts must always be tightened progressively across the entire set of bolts.
To ensure that our exhausts are fitted under the best conditions, a mounting kit containing: gaskets, stainless steel bolts, stainless steel lock nuts and high temperature copper grease, is included with your exhaust.