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MAPerformance 3.5" exhaust review

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  • Member
  • Pip
  • 31 posts
  • 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.

  • Tim likes this

Beautiful Blue FBO 2013 R35 GTR

655/638tq Daily Driven street thrasher!


Cobb 3" Intakes
SBD Race Intercooler with TiAL 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



    Stage 4 Member

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  • 1,835 posts
  • Joined 16-February 14
Looks similar to the HKS legamax - assuming windows up. Congrats.

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

TSM Billet Crank 4.1 w/ CP billet pistons, TSM Elite Prime turbos, TSM Wet Sump Oling upgrade, flex fuel, ETS mid and down pipe, STM titanium axle back, STM race FMIC, ID2000’s, Shep One K with drop gears and all the goodies., DS Axles, Volk Saga 18” 10/12” (MT ET Streets), Advan GT Premium 20” R888. 1450+ hp / 1210+ tq

Old setups : Alpha 9 w/ AMS 3.8, GTX3582R Gen II w/ AMS 4.1 billet crank, GTX3582R Gen II w/ AMS 4.0 big bore billet crank and of course FBO E85.



    FYI Gators eat the bones

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  • Joined 06-December 12
  • LocationBlue water and White Sandy Beaches
Congrats on your purchase!!


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