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C4 Open Discussion General and technical C4 Corvette discussion - ownership, maintenance, repairs, modifications, tuning |
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01-26-2011, 6:34pm | #1 | ||||||
A Real Barner
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My exhaust comparison L98 Flowmaster, Magnaflow &Headman Elite.to stock LT1 (videos)
I upgrading my L98 exhaust to Magnaflow cat back.
My current exhaust is stock with Flowmaster 40 series and TPIS YPIPE. In this is the thread I will compare them with videos and pics. Edit: I went from This exhaust to Stock Lt1 exhaust and plan on going with Magnaflow 3" SS Lt1 catback so stay tuned. Here is the new exhaust |
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01-26-2011, 6:35pm | #2 | ||||||
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Here is the first video.
Stock exhaust with Flowmaster 40 series 2 chamber and TPIS Y-pipe. |
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01-26-2011, 6:36pm | #3 | ||||||
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I have the headers on now.
I have put on a lot of headers in my time and never had any that bolted up and fit perfect until today. I took the plugs,wires, and starter off. I took the S-belt off and the 4 long screws that hold the A/C compressor in place and moved it. The drivers side slid in from the top easily. The passengers went in from the bottom just as easy. |
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01-26-2011, 6:38pm | #4 | ||||||
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Now that the headers are on its time for a open header video
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01-26-2011, 6:41pm | #5 | ||||||
A Real Barner
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I got the Ypipe mocked up today. I used the stock y with the flares that came with the Elite Headers. I simply mocked them up and cut the ends off. I will have them welded by a shop.
I used a Skill saw with a cut off blade. It worked very well. |
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01-26-2011, 6:43pm | #6 | ||||||
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It's on, man it sounds great!
Here is the video |
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01-26-2011, 6:49pm | #7 | ||||||
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OK guys here is the Headman long tubes stock rear y and Flowmaster 40s.
The next video will have the Magnaflow on. http://s102.photobucket.com/albums/m118/lorddemoya/?action=view¤t=C4HeadmanHeadresFlowmaster40s.mp4 |
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01-26-2011, 6:52pm | #8 | ||||||
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I have the Magnaflow on now guys, I love it. It's quieter while cruising but has a great performance sound when I'm in it.
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01-26-2011, 6:54pm | #9 | ||||||
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No torque loss .. did a dyno run recently, I put down 268 HP 312FP to the wheels that's almost 400 foot pounds at the crank and the run was aborted because of a downshift ..
They are long tubes and IMO the best bang for buck mod for a L98. |
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01-26-2011, 7:05pm | #10 | ||||||
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My L98 dual exhaust... Brace yourself..
Ok, So my new Fast Burn head ports were way to big for my Headman headers. I sold those. My idea was to get some TPIS long tubes and 3" magnaflow cat back for a LT1 and use some bullet cats with a Xpipe. I would have to wait about 6 months to buy it sooo.
I was browsing and found some take out LT1 exhaust and for less that $170 I now have this exhaust including hangers. I measured the ports on the manifolds and they match almost perfectly. I cleaned them up with 100 grip wet and sanded the Mufflers with 400 to paint. |
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01-26-2011, 7:10pm | #11 | ||||||
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On an LT1 oil filter adapter is offset make room for the monster cats.
I sourced some replacements with bullet cats on the popular auction site. $314.00 shipped. |
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01-26-2011, 7:12pm | #12 | ||||||
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Thanks to Socalman for this info.
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01-26-2011, 7:13pm | #13 | ||||||
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I put the hangers on this afternoon. The front hanger bolts in the same place the L98 transmission hanger goes. The rear bolts to the botom 4 bolts on the backside of the rear end. I had to enlarge the holes in the rear hangers.
The hanger on the left has the holes enlarged. The one on the right is the stock size. |
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01-26-2011, 7:15pm | #14 | ||||||
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I have the cat back on it fits nicely. I'm waiting for My POR-15 for the manifold then i will put them on.
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01-26-2011, 7:18pm | #15 | ||||||
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Ok I got the rest on. Here are some pictures.
I had to bend the heat shield a little it was hitting the steering. It hits the stock oil filter so i will need to get a shorter filter. The PF454 is the same as the stock filter but 2" shorter. The passages side fits nicely. I now realize i am missing the hanger that bolts to the trans there. I will get some better pictures when I can get it running and on the ramps. I think it fits great. |
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02-12-2011, 10:10pm | #16 | ||||||
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Looking good!.. keep up the good work.
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02-12-2011, 10:31pm | #17 | ||||||
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It's ready to run.I'm just waiting on my tuner to come over and give me a street tune.
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02-13-2011, 7:23pm | #18 | ||||||
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Jose, FAIL, No hardcore take-off video.
You know we want to see something leaving two long black marks on the asphalt. I remember the days when Ch@0s did it right. |
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02-14-2011, 12:50pm | #19 | ||||||
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02-20-2011, 9:45am | #20 | ||||||
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Sounds good, let's see it when it is tuned. I put a total of 6 different combinations on mine, they were either too quiet or too loud. I finally settled on Magnaflows too because they were the only muffler that didn't have unbearable drone. I built my own system, coming off the headers into two hi flow cats, then an x-pipe then back into the tailpipes with universal Magnaflows on the rear in brushed stainless. A true dual system with only the x-pipe tying them together.
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