Posted: 10/1/2012 4:01:44 AM EDT
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These guys have done work for my whole family
Muffler Masters Dual Exhaust on my Chevelle. Dual with Cat back on my brother's Camero. Basic repair work on my dad's Nissan. |
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Quoted:
What year, model and engine? It takes about 30 minutes to install a Flowmaster Thunder Series cat-back. No welding required, but it is optional. I installed in on an 05, 08, and 12. None had a Y pipe, unless it is before the cat. It's a '12, Hemi Sport. Y-pipe is right after the cat (pics in the OP are from an '11). Most of the cat backs start just after the y-pipe, and in this case, the y-pipe is pretty bad. Most are reporting more gains from replacing the y-pipe than the cat-back exhaust (or muffler swap). |
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Quoted: Quoted: What year, model and engine? It takes about 30 minutes to install a Flowmaster Thunder Series cat-back. No welding required, but it is optional. I installed in on an 05, 08, and 12. None had a Y pipe, unless it is before the cat. It's a '12, Hemi Sport. Y-pipe is right after the cat (pics in the OP are from an '11). Most of the cat backs start just after the y-pipe, and in this case, the y-pipe is pretty bad. Most are reporting more gains from replacing the y-pipe than the cat-back exhaust (or muffler swap). How much of a gain? Dyno proven? I was just under my truck last night. I always weld after clamping on a system, but I missed one. The system had slipped back almost a half inch and had a bit of a leak. The whole works was just barely hanging on to the rubber hangers until I pushed it back on and welded. The Y pipe does look a bit restrictive, but the truck is already making decent numbers. Here is the part, in case anyone is curious: http://www.summitracing.com/parts/MPE-10778/ Damn, this site keeps costing me money....
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What year, model and engine? It takes about 30 minutes to install a Flowmaster Thunder Series cat-back. No welding required, but it is optional. I installed in on an 05, 08, and 12. None had a Y pipe, unless it is before the cat. It's a '12, Hemi Sport. Y-pipe is right after the cat (pics in the OP are from an '11). Most of the cat backs start just after the y-pipe, and in this case, the y-pipe is pretty bad. Most are reporting more gains from replacing the y-pipe than the cat-back exhaust (or muffler swap). How much of a gain? Dyno proven? I was just under my truck last night. I always weld after clamping on a system, but I missed one. The system had slipped back almost a half inch and had a bit of a leak. The whole works was just barely hanging on to the rubber hangers until I pushed it back on and welded. The Y pipe does look a bit restrictive, but the truck is already making decent numbers. Here is the part, in case anyone is curious: http://www.summitracing.com/parts/MPE-10778/ Damn, this site keeps costing me money.... ![]() Yeah - but if you're local - maybe we can get the shop to do a two for ...well, less than two, deal of some sort! I haven't been able to find a dyno from the 4th gen trucks, but most are claiming a MPG bump and a drop in 1/4 mile times (or some combination thereof, depending on the driver) - which does lead me to believe it is freeing up some flow. And you are right - even stock, the truck is making some pretty good numbers, but this just seems to be a glaring error in an otherwise pretty stout package. |
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Ok, a dyno is done.
It's not perfect - because it is comparing a stock truck to another truck with a y-pipe, headers, and cat back, as opposed to same truck before and after. Still - 15hp increase. I'd be surprised if it all was due from a Monday truck to a Friday build truck. Just don't know how much is from the y-pipe itself, as compared to the headers and cat back.
Here's the link: http://www.ramforumz.com/showthread.php?p=934194#post934194 |

