The muffler on my -SE is doing a great impression of swiss cheese, so I'm going to have to replace it. The motor is stock, and I'm going to stay with the three stock cats. (There's talk of the sniffer test going away, so I'm not going to drop the cash now to put a new high-flow cat in there). I'm looking at a Walker replacement from Advance Auto which, from my searching, seems to be a pretty decent one. Searching their parts catalog, they return a part number that Walker states is for a 12A. Looking at the parts diagram from Mazda, there are different part numbers for the muffler assembly, but the only difference appears to be the tips. Is there any difference in the muffler itself between the two engines? On one hand, I want to trust the guys at Advance... but on the other hand, they've been having a hard time getting brake pads right. Anybody know about the Walker 45920 on a 13B -- or if there is a significant muffler difference between the 12A and 13B cars?

Thanks much!

 

Uhh. Its a muffler. I'm going to guess no. Whats important is that its the right size and its for the right chassis so all the hangars match up.

 

actually, the mufflers are the same for a 12A and 13B. a lot of times, the cheaper mufflers will crack due to the high heat of the rotaryputs out. basically, they can't handle the heat and split. a friend of mine went through 3 mufflers in a year. he used dynomax.

 

yea... what he said... you have to make sure that the muffler can take the heat or you will just be getting anew one in a few months.

 

I say invest the cash and get a Racing Beat PowerPulse muffler. That way you are 1/3 of the way to a full RB exhaust system, seeing as you have to replace it anyway

www.racingbeat.com

Jon

 

the mufflers are a bit different. if you notice any 12A car that has the original one, you will see that thet they have the infamous one or both tips missing in action. the GSL-SE has a different muffler with the tips welded on and they kinda enlarge from the muffler to the end like a subtle ice cream cone