Deep tone mufflers
Extreme HDF Member
Joined: Nov 2007
Posts: 14,670
Likes: 139
From: East of the Sun, West of the Moon
you won't find better "deep rumble" sound pipes than CFR and Thunderheaders.
Both come with a caveat though, loss of backpressure which results in loss of low end TQ. How much, I don't know and neither does anyone else (unless they've actually done a comparison on a Dyno). Call Cory Faas and he'll tell you a couple of ft lbs max but then he's selling his pipes so take that with a grain of salt.
Both come with a caveat though, loss of backpressure which results in loss of low end TQ. How much, I don't know and neither does anyone else (unless they've actually done a comparison on a Dyno). Call Cory Faas and he'll tell you a couple of ft lbs max but then he's selling his pipes so take that with a grain of salt.
Road Captain
Joined: Oct 2013
Posts: 526
Likes: 8
From: Jackson, MS
I had the CFR's, they sound really good - long term quality sucks
I have Jackpot Pro Touring with their header and really loke the sound not as obsene as the CFR's
I also had Fullsac header and cores, perfect fit and perform great, sound was to quiet for me.
I have Jackpot Pro Touring with their header and really loke the sound not as obsene as the CFR's
I also had Fullsac header and cores, perfect fit and perform great, sound was to quiet for me.
Grand HDF Member
Joined: Mar 2008
Posts: 4,996
Likes: 655
From: bklyn,ny
Extreme HDF Member
Joined: Nov 2007
Posts: 14,670
Likes: 139
From: East of the Sun, West of the Moon
Be a little more specific other than "long term quality sucks" and "you can feel the TQ dip at the seat, not sure how that relates to a dyno" otherwise your comments are worthless and not useful to anyone.
Tourer
Joined: Mar 2014
Posts: 413
Likes: 12
From: St Louis
you won't find better "deep rumble" sound pipes than CFR and Thunderheaders.
Both come with a caveat though, loss of backpressure which results in loss of low end TQ. How much, I don't know and neither does anyone else (unless they've actually done a comparison on a Dyno). Call Cory Faas and he'll tell you a couple of ft lbs max but then he's selling his pipes so take that with a grain of salt.
Both come with a caveat though, loss of backpressure which results in loss of low end TQ. How much, I don't know and neither does anyone else (unless they've actually done a comparison on a Dyno). Call Cory Faas and he'll tell you a couple of ft lbs max but then he's selling his pipes so take that with a grain of salt.
Cruiser
Joined: Jul 2013
Posts: 115
Likes: 2
From: FL/CO
I had CFR's on my Limited. I loved the way they sounded, and with all else stock I didn't have any problem with them. When I went with Jackpot 2-1-2 head pipes is when it went south. I did cam's and an intake as well...but I think it's the headers that are the problem. Between no-cat headers and the wide open CFR's there just isn't enough back pressure for proper scavenging and such. Switched to Jackpot 4" slip-ons and all's well. I'll be putting the CFR's up in the classifieds soon. BTW, as far as CFR quality, no peeling or flaking issues on mine, I know there was supposedly a batch at one point that had some chroming issues.
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Extreme HDF Member
Joined: Nov 2007
Posts: 14,670
Likes: 139
From: East of the Sun, West of the Moon
after putting them on and riding it a little while with no change whatsoever to the tune, I notice no difference in the seat of the pants with the Rinehart Slimline Dual head pipe. Of course once I get it up to Ed to tune, I'm sure that will differ but I'm also going to go ahead and grab the TTI from DK Customs to have on hand while at the tuner. If need be I'll put them in there and proceed to see what difference it makes.
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Extreme HDF Member
Joined: Nov 2007
Posts: 14,670
Likes: 139
From: East of the Sun, West of the Moon
I had an hour long conversation with Kevin from DK Custom last night. In our talks it was disclosed to me that backpressure is not the issue but instead it's reversion. It's the amount of air that's being sucked back into exhaust stream (yep it gets sucked back in) and is fighting against the air moving outward of motor and the exhaust pipes. Here is my CFRs. take a look at the left pipe especially and you can see what reversion is actually doing by sucking air back into the exhaust stream. this is supposedly where the TTIs come into play by preventing most of that from going back in. I don't know that to be fact but sure sounds logical to me. I will certainly test it when they come in.
https://www.dropbox.com/s/kzbaeolbgcyfvxq/CFRs.mp4
https://www.dropbox.com/s/kzbaeolbgcyfvxq/CFRs.mp4