[rdass623]

as stated, the system is for a 987. on the 987 there are no secondary cats. if you are looking for a 986 system, purchase the secondary cat delete pipes. pretty much all of the made in china mufflers will give you a better not to the exhaust, but the sound is so much better with the secondary cats deleted. personally I would recommend getting the cat delete pipes and installing them before a muffler swap and trying out the sound, then if you wanted to go for more note, add the muffler later if desired. as a bit of advice, do not just change the muffler, the drone is horrible without the delete pipes.