2017 Civic Si Muffler Delete

Superfly

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Did the same on my 18 Si Sedan, love it! Hardly any drone, crackles and pops and I can still hear the turbo spool and the @PRL Motorsports CAI

Definitely recommend for a cheap mod. Local muffler shop charged me $45.00





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NoKz

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Please clarify ... When you say "muffler delete" there are TWO mufflers ... are we talking about leaving the two resonators and removing ONE muffler? Or are we talking about leaving both resonators and removing TWO mufflers? I have always found this confusing ... I doubt I am the only one! Thank you... I would def consider the combo of PRL CAI and muffler delete but in New York State I WONT PASS INSPECTION with no muffler what so ever.
I removed BOTH mufflers in the rear on the right and left. I left the resonator untouched.
 

cwcaesar

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Please clarify ... When you say "muffler delete" there are TWO mufflers ... are we talking about leaving the two resonators and removing ONE muffler? Or are we talking about leaving both resonators and removing TWO mufflers? I have always found this confusing ... I doubt I am the only one! Thank you... I would def consider the combo of PRL CAI and muffler delete but in New York State I WONT PASS INSPECTION with no muffler what so ever.
There is ONE Resonator and TWO Mufflers. I had the TWO Mufflers removed, but left the resonator in place. I also don't have vehicle inspections where I live. The car was too quiet with the mufflers installed. I can now hear the exhaust without it being annoying. And, it's really only 'loud' when you get on it. I drove my wife around for days and she couldn't tell anything was different (and she hates loud cars). She only figured it out when she saw the mufflers sitting in the corner of the garage. It is just loud enough now, and I love the crackle and pop sounds!
 

healtoe

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Im planning to just upgrade to the PRL front pipe / Catless downpipe and was hoping since the downpipe is cattless it would make it sound more aggressive but not obnoxious loud with too much drone. I wanna see if anyone has a cattless downpipe video vs muffler delete video to compare the sounds.
There was another Si with muffler delete and downpipe that pulled up beside me. It sounded pretty good but the guy said that at highway speeds it would be annoying. He was getting an catback done next. He recommended that if I just want the pops and crackles get just the delete with downpipe it sounds like a pop can civic.

The Fiat Abarth with no factory mufflers is the sound that is just right IMO
 

REBELXSi

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Please clarify ... When you say "muffler delete" there are TWO mufflers ... are we talking about leaving the two resonators and removing ONE muffler? Or are we talking about leaving both resonators and removing TWO mufflers? I have always found this confusing ... I doubt I am the only one! Thank you... I would def consider the combo of PRL CAI and muffler delete but in New York State I WONT PASS INSPECTION with no muffler what so ever.
There are definitely two mufflers but 2 resonators? There's only one.
 

alexrawdriguez

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There was another Si with muffler delete and downpipe that pulled up beside me. It sounded pretty good but the guy said that at highway speeds it would be annoying. He was getting an catback done next. He recommended that if I just want the pops and crackles get just the delete with downpipe it sounds like a pop can civic.

The Fiat Abarth with no factory mufflers is the sound that is just right IMO
Agreed they sound very nice, they sound very similar to SRT-4 actually just not as loud obviously.
 

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