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Hey all, I purchased the CVF turbo-back system a few months back and now have over 2k miles on it and feel comfortable providing my review. I have a 2023 base sasquatch 4dr 2.7 and I was completely stock before doing this install.
First, the boxes (one with headers, the other with the cat-back system) were a little ragged upon arrival but after opening and inspecting there was no damage. They are packed with expanding foam and everything is held together pretty nicely. There are no instructions for the install, but if you are diving in to this project yourself it becomes blatantly obvious where the different parts go so this shouldnāt be a problem.
Here you can see the welds, the entire system is beautiful with zero flaws that I could find.
Stock removal ā I didnāt take any pics because I did this in my dark garage by myself over a weekend. Frankly, it sucked but this is not my first downpipe rodeo so just be prepared for a lot of shoulder deep wrenching and have your PB Blaster ready. The stock cat-back came off in a few minutes with no issues. Use a little lube and an exhaust hanger tool to make this easier on yourself. I bought this one for $12 and it was fine (https://www.amazon.com/dp/B0B5XC5F6X?psc=1&ref=ppx_yo2ov_dt_b_product_details). Removing the stock downpipes was the most time consuming part and there was not a lot of DIY info that I could find for help. The only way I was able to get them out without cutting was to support the transfer case, and drop the front cross member to get enough clearance. I also had to loosen the gas tank skid plate to get the brace out. Once that is down, removing the bolts from the downpipes isnāt too bad and trying to maneuver the pipes out of their stock home is tight, but possible. Once the downpipes were out, three of the four O2 sensors came off no problem, but the stubborn one just needed more PB blaster and it came off eventually. I had about 15k miles at the time just as an FYI.
Install ā The CVF downpipes went in pretty easily. They have less heat shielding and weird shapes than the stock unit so it was no problem lining up the bolts and getting everything snug. From there I worked front to back assembling everything but leaving some slack for movement. Once the full system was installed I went back and tightened everything then put on the tips.
Sound ā The real reason any of you are here. Initially there was some rasp in the 3-4k rpm range that I was not a fan of and I had even thought about putting on the stock cat-back to see if it would help. However, I stayed the course and I am happy to say that rasp has gone away. Instead of that being an annoyance prior to breaking in, now it is a louder tone that I can hear when Iām giving it some decent gas from about 3500+ RPM.
Drone ā There is none. I donāt mean thereās not much, or just a little bit, there is zero. Cruising at any speed from 30-70 it sounds completely stock. I took some dB readings before and after but due to wind noise and getting a new phone they donāt reflect what you actually hear in the cab. Here are a couple videos from in the cab showing the sound-
Stock:
CVF:
Here are a couple cold start videos-
Stock:
CVF:
And here are some parking lot pulls. Both are sport mode 2H from 0-45 mph.
Stock:
CVF:
Final thoughts ā All I can say is that Iām a huge fan of this system and after it broke in, I love it. I canāt tell any sort of power gain from the butt dyno but I am excited for the tuning possibilities that it opens down the road (E30!). Let me know if you have any questions, want me to measure anything, or record anything and Iāll do what I can to help. Thanks to everyone who provides info on this forum, I have spent way too many hours researching these Broncos, and hopefully this post is my way of giving some info to the community as well.
Bk
First, the boxes (one with headers, the other with the cat-back system) were a little ragged upon arrival but after opening and inspecting there was no damage. They are packed with expanding foam and everything is held together pretty nicely. There are no instructions for the install, but if you are diving in to this project yourself it becomes blatantly obvious where the different parts go so this shouldnāt be a problem.
Here you can see the welds, the entire system is beautiful with zero flaws that I could find.
Stock removal ā I didnāt take any pics because I did this in my dark garage by myself over a weekend. Frankly, it sucked but this is not my first downpipe rodeo so just be prepared for a lot of shoulder deep wrenching and have your PB Blaster ready. The stock cat-back came off in a few minutes with no issues. Use a little lube and an exhaust hanger tool to make this easier on yourself. I bought this one for $12 and it was fine (https://www.amazon.com/dp/B0B5XC5F6X?psc=1&ref=ppx_yo2ov_dt_b_product_details). Removing the stock downpipes was the most time consuming part and there was not a lot of DIY info that I could find for help. The only way I was able to get them out without cutting was to support the transfer case, and drop the front cross member to get enough clearance. I also had to loosen the gas tank skid plate to get the brace out. Once that is down, removing the bolts from the downpipes isnāt too bad and trying to maneuver the pipes out of their stock home is tight, but possible. Once the downpipes were out, three of the four O2 sensors came off no problem, but the stubborn one just needed more PB blaster and it came off eventually. I had about 15k miles at the time just as an FYI.
Install ā The CVF downpipes went in pretty easily. They have less heat shielding and weird shapes than the stock unit so it was no problem lining up the bolts and getting everything snug. From there I worked front to back assembling everything but leaving some slack for movement. Once the full system was installed I went back and tightened everything then put on the tips.
Sound ā The real reason any of you are here. Initially there was some rasp in the 3-4k rpm range that I was not a fan of and I had even thought about putting on the stock cat-back to see if it would help. However, I stayed the course and I am happy to say that rasp has gone away. Instead of that being an annoyance prior to breaking in, now it is a louder tone that I can hear when Iām giving it some decent gas from about 3500+ RPM.
Drone ā There is none. I donāt mean thereās not much, or just a little bit, there is zero. Cruising at any speed from 30-70 it sounds completely stock. I took some dB readings before and after but due to wind noise and getting a new phone they donāt reflect what you actually hear in the cab. Here are a couple videos from in the cab showing the sound-
Stock:
CVF:
Here are a couple cold start videos-
Stock:
CVF:
And here are some parking lot pulls. Both are sport mode 2H from 0-45 mph.
Stock:
CVF:
Final thoughts ā All I can say is that Iām a huge fan of this system and after it broke in, I love it. I canāt tell any sort of power gain from the butt dyno but I am excited for the tuning possibilities that it opens down the road (E30!). Let me know if you have any questions, want me to measure anything, or record anything and Iāll do what I can to help. Thanks to everyone who provides info on this forum, I have spent way too many hours researching these Broncos, and hopefully this post is my way of giving some info to the community as well.
Bk
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