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MAPerformance 3.5" exhaust review

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#1
JohnnyTSi

JohnnyTSi

    Stock

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  • Joined 16-March 19
  • LocationEverett, WA
My goal was to reduce backpressure without increasing exhaust noise, the stock catback on my car was a bit annoying at cruise with a mid pitched drone. My car already had Cobb Down Pipes and Mid Pipe with a Borla Resonator. I read everything I could find about aftermarket catback systems and listened to lots of sound clips trying to decide what to buy.
 
Several of the local GT-Rs also helped eliminate some options
 
Nismo 3.5" unmuffled = pretty loud Sounds excellent but would probably draw too much attention for a daily.
SBD 4" Race = holy shit thats loud!! The sound is amazing on this, just not for a daily driver WAY too loud!
I also talked to a local with a Meisterschaft it sounded great - but again, just much louder than I wanted!
 
As I already had DP and Mid-Pipe I was looking for just a cat-back system. The HKS Legamax was in the running, (Thanks majj35 for the excellent audio clips) but its smaller diameter kept me from buying it. I kept looking at the ARMYTRIX for the best of all worlds but my cc squeaked every time I looked at their web site!
 
I finally settled on the MAP 3.5" stainless muffled version to match the diameter of my Cobb Mid Pipe.
  • Shipping was quick
  • the tig welds look good
  • the brackets have extra bracing with extra long welds on both sides of the rod for strength
  • Fitment was good - no drama with rubbing or rattles. I did have to loosen and re-tighten the V-Band and front flange bolts a couple times to get it to mate flush, but once in the right position fit as expected.
  • And the best part is the sound. The 3.5" pipe dropped the note much lower than the stock exhaust. I also see that my fuel trims say It is now flowing more air than the stock exhaust!
The end result was exactly what I wanted, less drone and overall cabin noise AND better flow. I did some before/after measurements using Androsensor App on my Galaxy S9 phone.
 
Capture.JPG
 
John-
 

  • Tim likes this

Beautiful Blue FBO 2013 R35 GTR

655/638tq Daily Driven street thrasher!

 

Cobb 3" Intakes
SBD Race Intercooler with TiAL QR BOVs

Cobb catted Down Pipes
Cobb mid pipe modded with a Borla resonator
MAP Muffled 3.5" cat back
ASNU 330 pumps
id1300x2 injectors
Visconti Flex Fuel kit
Omni 4bar Map sensor kit
Cobb Fuel Pressure sensor kit
Torque Solution Maf Block-off Plates


#2
droptopp

droptopp

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Looks similar to the HKS legamax - assuming windows up. Congrats.

Edited by droptopp, 01 August 2019 - 04:36 PM.

GTX3582R built and tuned by STM, AMS 4.1, Omega billet crank, Alpha Cams, STM DP, MP, 4 STM Titanium custom exhaust, STM Race FMIC 22x18x4.5, full 3" piping, ID 2000, Sheptrans OneK drop gears, DS axles, E85, Advan GT 10/12 285/315 R888 / MT ET 18x10/12 TE37 Saga MT ET SS 275/245.
Heartbreaker Mustang 1186 E70 low boost. Dynojet 1350 +/- 60-130 3.5 seconds. 100-150 3.4 seconds.

#3
Tim

Tim

    FYI Gators eat the bones

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  • LocationBlue water and White Sandy Beaches
Congrats on your purchase!!
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