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4" Mufflex & 4" Magnaflow straight thru muff

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JP112_89

Well-Known Member
Joined
May 16, 2008
Messages
1,298
A friend of mine and I installed the 4" Mufflex cat-back Saturday night. Being a glutton for punishment, I did not use a lift. Surprisingly, everything went well.

A few nights before I sprayed the system with 3M Weld Thru Primer. Stuff works awesome and should last a LONG time. I did spray both ends of the Magnaflow 4" stainless steel muffler up to the welds... the muffler is stainless steel but both ends are not so...

I was so surprised the system so hung well. Don't get me wrong, it's tight all over but fits GREAT! There is about 7-8" of clearance from lowest part of my intermediate pipe to the ground. We took our time and everything looked too cool.

Next, I wanted to run a few tests. Amazingly, the Hooker 3" cat back weighed more than my new 4" badasss system. Hooker cat back weighed 48 lbs to 35lbs for the Mufflex cat back!:D Reason being.. the Hooker has dual tail pipes and of course dual tips to the one LARGE outlet of the Magnaflow. But the main reason is that the Hooker muff is much heavier than the stainless Magnaflow straight through muffler.

Now we had to start his animal. First impressions were... wow, it's not too loud:) at idle. Has a low deep tone.:cool:
Next morning, I took the TTA to hear the WOT blasts. Again, not too loud. Much quieter for sure than opening the dump.;) I can still hear the motor really well compared to the opened dump. I guess having a turbo does quiet the noise.. the 6262 is a quiet turbo.. along with 4" straight through muff.

Loud to me might be different from others. Some might say "he's nutz" it's has to be really loud because of the straight through 4" design. Really... it's NOT!

One last thing, it felt like 30 HP was added. Spool-up, throttle response and power were immediately noticed. My test pipe is now 3" instead of 2.5", increased the cat back 1" and went to a straight through muff. Also noting that I added a 3" up pipe.

IMO.. Mufflex system is super. Twice as $$$ as the Hooker.. but 5X's better. I will post more pix later due to needing better lighting. Here is some shots taken with my cell phone... will post better pix later in the week.
 

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Last one. The 3M Weld thru Primer works great on the exhaust.
 

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Looks like a nice clean install. How is it at cruise between 60-70mph? Drone or no drone?
 
Looks like a nice clean install. How is it at cruise between 60-70mph? Drone or no drone?

This system was easy and fun to install. Still amazed it fit, lol, and fit well. No drove at 60-70mph. I tested with the windows up as well and was very happy:).
 
FCK....why couldnt you have installed this last summer...i hate my $400 magnaflo with the chessey tailpipes..:frown::frown::frown:
 
I bet..

FCK....why couldnt you have installed this last summer...i hate my $400 magnaflo with the chessey tailpipes..:frown::frown::frown:


I disliked my Hooker tips too! hahaha The new tailpipe lays very neat, clean and tucked nicely. Looking underneath from the rear... all you see is a BIG BLACK HOLE. lol
 
Just need to get a 5" DP! ZERO back pressure!!! I like it.

Do you like the sound? Can you hear the turbo spool/V6 sound or is it more V8-ish?
 
pm me your email and I will send a pic. I could do later tonight for sure.

Just a short clip.. cold start... hard to tell what it sounds like unless you have good speakers.lol There is drone around 2000 rpm and 50 mph. I really like it though! I would buy again. T66 sounds nice through the 4" straight thru exhaust and four inch maf pipe. Sounds like a fighter jet..

116 0279 - YouTube
 
Do you have anymore sound clips of the 4" system?, I want to go that route but hate exhaust with a drone. Its hard to find sound clips of this system with the turbo 6.
 
Do you have anymore sound clips of the 4" system?, I want to go that route but hate exhaust with a drone. Its hard to find sound clips of this system with the turbo 6.

This exhaust system does drone but you will never have to open the dump again. Reason being, you will not see any gains by opening the dump on 4" exhaust. Yes, 4" is overkill but the dump is too damn loud for me.
You might want to call Mufflex and explain what your goals are.

I would buy again though. Sounds great at WOT.

Joe
 
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