View Full Version : 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
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/L98MagnaflowCatbackandEliteheaders.jpg
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/L98MagnaflowCatback.jpg
Here is the first video.
Stock exhaust with Flowmaster 40 series 2 chamber and TPIS Y-pipe.
YouTube - Stock with Flow 40s.AVI
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.
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/Elitesonrightside.jpg
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/Elitesonunderneath.jpg
Now that the headers are on its time for a open header video :D
YouTube - 91 C4 corvette open heders.AVI
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.
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/Exhaustmockedup.jpg
I used a Skill saw with a cut off blade. It worked very well.
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/SkillsawSteelblade.jpg
It's on, man it sounds great!
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/Ypipeweldedon.jpg
Here is the video :hurray:
OK guys here is the Headman long tubes stock rear y and Flowmaster 40s.
The next video will have the Magnaflow on.
C4 corvette Headman headers video by lorddemoya - Photobucket
YouTube - C4corvette FLY BY fast Headman Headres Flowmaster 40s .AVI
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.
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/Magnaflowsareonrearpic.jpg
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/Centercatison.jpg
YouTube - C4 Corvette CC502 cam Headman Headers HSR Magnaflow Stainless.AVI
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.
YouTube - Dyno Video 1991 l98 c4 corvette cc502 cam HSR intake
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.
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/picture-7.jpg
I cleaned them up with 100 grip wet and sanded the Mufflers with 400 to paint.
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/picture.jpg
On an LT1 oil filter adapter is offset make room for the monster cats.
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/LT1oilfilterclearance008Large.jpg
I sourced some replacements with bullet cats on the popular auction site.
$314.00 shipped.
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/picture-2.jpg
Thanks to Socalman for this info. :cheers:
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/0011280x768.jpg
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/0021280x768.jpg
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/0031280x768.jpg
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/0041280x768.jpg
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.
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/picture-3.jpg
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.
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/picture-4.jpg
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/picture-5.jpg
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/picture-6.jpg
Ok I got the rest on. Here are some pictures.
I had to bend the heat shield a little it was hitting the steering.
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/SteeringFitLt1Exhaust.jpg
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.
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/FilterfitLt1Exhaust.jpg
The passages side fits nicely. I now realize i am missing the hanger that bolts to the trans there.
http://i102.photobucket.com/albums/m118/lorddemoya/Corvette%20exaust/PasscatconLt1Exhaust.jpg
I will get some better pictures when I can get it running and on the ramps. I think it fits great.
slrvette
02-12-2011, 10:10pm
Looking good!.. keep up the good work.
It's ready to run.I'm just waiting on my tuner to come over and give me a street tune. :hurray::dance:
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. http://guildwars.incgamers.com/forums/images/smilies/large/smiley_sad.gif
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. http://guildwars.incgamers.com/forums/images/smilies/large/smiley_sad.gif
Still waiting :sad:
Midnight85
02-20-2011, 9:45am
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.
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.
How does it sound? Do you have any videos?
Midnight85
02-20-2011, 10:28am
I'll see if I can get one today but it won't be outside, the car is still on dollies.
Midnight85
02-20-2011, 11:51am
Well, my last vid had Elvis in it, this one has the furnace blower going. At least the Vette thunder covers it. Like I said, this is not too good being it is inside but,,,,
ex001.mp4 video by Midnight85 - Photobucket
NEVRL8T
03-16-2011, 6:35pm
Now that the headers are on its time for a open header video :D
Holy shit! :omg:
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