It was probably backfiring because the AIS wasn't blocked off.
If that is the case then any after market can you stick on will do it.
If you de-accelerate really hard with the standard can you may hear it popping very faintly.
Edited because I couldn't spell here right :lol
If that is the case then any after market can you stick on will do it.
If you de-accelerate really hard with the standard can you may hear it popping very faintly.
Edited because I couldn't spell here right :lol