GTI Jake
Autocross Champion
- Location
- Charlotte, NC
There's been a lot of talk around here lately about drone issues for those running an aftermarket downpipe (catted or catless). I'm building a full 3" 304/304L stainless steel catback to fully eliminate this issue and bring the exhaust note down to a more civilized level than my current set up (Cts catted DP+stock cat back with 3" muffler delete). Since there's been a lot of interest in this topic I figured I'd do kind of a build thread with all of the info on my cat back. I titled the tread turbo back since this cat back is built specifically to match a 3" downpipe and it's added volume. Ideally with a stock downpipe I'd still 100% suggest a muffler delete, unless you plan to upgrade the down pipe later.
I'll start with my parts list, hopefully everything willl arrive early next week inline with my "weekend" which is Wednesday-Thursday. I spent a lot of time choosing a resonator and muffler to meet my three requirements: 304SS construction, straight through design, and proper lengths for fitment and drone elimination. I believe most of the drone left after Vibrant 1141 are because of its short case length 14", so I went with a much longer 18"x5" round Vibrant 17950. The muffler is Borla link here > https://m.summitracing.com/parts/bo...MIwePF-62i1QIVxUwNCh2eWg3kEAQYASABEgJH2_D_BwE
Time will tell but it should sound comparable to the AWE Touring exhaust, and I'll have under $450 invested. If anyone's interested I might build more to sell, which with my labor and consumables factored in would be in the $650-700 range. All of these figures are single exit style. As of now I don't plan to build dual exit, mostly because I don't care for dual exhaust on a four cylinder car, but also because it would be close to the same price as AWE so probably not worth my time or the larger investment in material.
sound clips below
https://youtu.be/at4wLClyifA
I'll start with my parts list, hopefully everything willl arrive early next week inline with my "weekend" which is Wednesday-Thursday. I spent a lot of time choosing a resonator and muffler to meet my three requirements: 304SS construction, straight through design, and proper lengths for fitment and drone elimination. I believe most of the drone left after Vibrant 1141 are because of its short case length 14", so I went with a much longer 18"x5" round Vibrant 17950. The muffler is Borla link here > https://m.summitracing.com/parts/bo...MIwePF-62i1QIVxUwNCh2eWg3kEAQYASABEgJH2_D_BwE
Time will tell but it should sound comparable to the AWE Touring exhaust, and I'll have under $450 invested. If anyone's interested I might build more to sell, which with my labor and consumables factored in would be in the $650-700 range. All of these figures are single exit style. As of now I don't plan to build dual exit, mostly because I don't care for dual exhaust on a four cylinder car, but also because it would be close to the same price as AWE so probably not worth my time or the larger investment in material.
sound clips below
https://youtu.be/at4wLClyifA
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