'System ONE' is a unique ADJUSTABLE SOUND Muffler/Midpipe Combo! Emissions Legal in ALL 50 States!

DESCRIPTION

System ONE Combines a unique Quad outlet muffler replacement with Helmholtz resonator to remove drone and a complete ADJUSTABLE SOUND Midpipe with Quick Change Magnaflow rockwool packed Resonator, all in 400 series stainless with full 2.5 inches diameter for best turbo performance, and polished Quad 3 inch tips! Plus made to accept optional High Flow Crosspipe for better turbo spool and hp, which is a separate cost item on this site (item 61-2348). System One is made exclusively for Good-Win Racing by Magnaflow, and should not be confused with the lower content non-adjustable and non-Helmholtz Magnaflow branded system also sold on our site (item 61-2216 on our site).

FEATURES:
Unique Quad Tip Muffler Delete Section with Helmholtz Resonator!
Midpipe with Quick Change Ultra Efficient Magnaflow Resonator.
Fits QUAD TIPS to ALL models of the Fiat 124.

THREE MAIN FEATURES IN DETAIL:

(1) Unique Helmholtz Resonator!. BIG Helmholtz resonator in the muffler delete section gives you all the lovely burble of muffler delete setups while cutting the drone you don't want by over 40db. Most all high end exotic sports cars include a helmholtz chamber built inside the stock muffler to edit the final sound carefully to lower drone, here our Helmholtz is MUCH bigger than stock setups to aggressively knock down drone so we can use far less packing material in the midpipe resonator (and none with straight pipe insert installed).

(2) ADJUSTABLE SOUND Midpipe with Quick Change Resonator! One of the reasons we call it System 'ONE' is that it answers the most popular question we get with our current RoadsterSport choices: should I get the RoadsterSport System with midpipe resonator, or without midpipe resonator? Now you don't have to make that choice because you have BOTH in the box, System ONE box includes a midpipe that has a small removeable section so you can add the included resonator when you want, and remove it when you want. Got a track day weekend or fun canyon cruise coming, add the straight pipe. Got a early work morning when you need to quietly exit the neighborhood, use the resonator. The resonator itself is about a foot long and uses Magnaflow's unique and highly efficient non fiberglass packing that is very efficient at sound suppression by weight. So when you want it wild, use the included straight pipe section for the midpipe. And when you want it mild, use the included Magnaflow resonator. Just single bolt V-clamps either side of the resonator make it easy to swap, see the video for best understanding of this feature.

(3) Fits ALL versions of Fiat 124! Another reason we call it System ONE is it is one system that fits ALL VERSIONS of the Fiat 124. Yes, it fits both Automatic and Manual Transmissions. Yes, it fits all trim packages: Abarth, Classica, Lusso. Yes, everyone gets big Quad Tips with the ONE!

What is NOT INCLUDED, BUT OPTIONAL: Magnaflow Crosspipe of 2.25 inch diameter that fits ALL versions of the car using System ONE (does NOT fit other Magnaflow systems), unlike our RoadsterSport brand 2.5 inch Crosspipe this optional Crosspipe is 2.25 inches only so it fits automatic and manual (see that Crosspipe which is item 61-2349 elsewhere on our exhaust page). That Crosspipe is the KEY item to making your turbo come alive! Makes your turbo spool faster and at much lower rpms than stock. Stock crosspipe is terrible for performance, starts at just 2 inches diameter and is pinched down to about 1.7 inches right at the inlet, which keeps your turbo from spooling quickly!

BRIAN'S APPLICATION NOTES: Our other RoadsterSport choices already include a lot of options plus flexibility to start with just the muffler delete and add midpipe and crosspipe later. So if we already make the BEST and only REAL highflow complete 2.5 cat-back exhaust systems, why start from scratch and do it yet again? Simple, we got to testing highflow downpipes... and that's where we noted we start to get some BOOMY DRONE in the mix. So we asked the question, and dared to imagine, what would the ultimate Fiat 124 system feature set designed from front to back would it look like if we did it with Magnaflow materials?

Unlike our other RoadsterSport systems you CANNOT buy just this muffler delete part of this setup, and you cannot buy just the midpipe part of this setup. Unlike our existing RoadsterSport systems where customers can start with muffler delete and later add the rest, here we started CLEAN sheet without concern for making anything backwards compatible with factory midpipe. Doing a complete system with none of the pieces backwards compatible with the cheapo flow limiting factory crosspipe, midpipe, muffler, means a true clean sheet design...or in this case CAD clean design.

Freed of constraints that come with making a muffler delete that will still mate to factory midpipe, we put everything where we wanted and gave the car precisely what it wants in terms of layout of a 2.5 inch muffler delete and midpipe combo. Result is best fit, design, function, and ultimately the best possible sound from a midpipe/muffler delete combo.

Why include a HELMHOLTZ CHAMBER? The helmholtz technology is a revolution in exhaust tech now in a Fiat 124 application. Our new HELMHOLTZ chamber muffler delete features an exclusive LARGE side branch resonator that massively reduces the standing wave drone 'boominess' that comes with a muffler delete that carries 2.5 inches of flow all the way from the turbo downpipe outlet. The Helmholtz chamber cuts the 'booming' frequencies of 120-130hz by about 40 db inside a top up Fiat 124 cabin which is a common source of complaints with aftermarket ultra high flow exhausts. Result is all the FUN throaty sounds you want, and no boomy drone!

Why not just use a mechanical valve and bypass at full throttle? The use of mechanical valves is popular in OEM exhausts right now, but this gimmick has come with many downsides that include highest failure rate of just about any part on the car. The valves live under the car in a harsh environment and they get coated in crap and they eventually stick and fail and become a common service complaint. The other downside with such valves is you get all or nothing....all the sound can be too much for many, and fully valved into a muffler can mean too on/off, too schizophrenic. If you want fun sound that builds in a linear manner in direct proportion to what your right foot does, then you don't want a valve.

With the Helmholtz chambers we use the neck to the Helmholtz as the valve to the tuned chamber, essentially an air valve that can never stick or fail. Moreover, with a Helmholtz chamber we can tune out just the frequencies we want to trim down, leaving all the fun exotic burble without the boom/drone downsides.

We also sell the Magnaflow branded muffler/midpipe combos on this site but they are just standard muffler and midpipe, no crosspipe option, no downpipe option, no helmholtz chamber to kill drone. Thus, performance is far from ideal in our view. More issues include that they use a ton of their high density non-fiberglass sound packing in a very large muffler, which is VERY effective at killing upper frequency, but results in a sound spectrum analyzer reveal an extremely limited dynamic range out the tail pipe. What does that mean? Imagine those times when you are trying very hard to listen to a really boring person on stage give a lecture, how hard is it to pay attention and appreciate what they are saying when they speak in a low constant monotone? You can just feel yourself going to sleep in the lecture right? Similar situation with the standard Magnaflow muffler/midpipe combo, they use so much packing material that it absorbs all the upper frequency fun these motors can make, leaving a rather boomy monotone low frequency drone that lacks dynamic character and variation. That result is not offensive, in fact it's exceptionally well controlled.... but boring as hell if you compare side by side with what we have here.

The advantage of working with Magnaflow here is that we can use a more measured amount of that super effective high density packing they specialize in, we put it in the midpipe area, combined with our experience with helmholtz chambers, to shape a sound result that is far more frequency customized. The sound is much more dynamic, interesting, exotic (baby maserati), and laugh out loud fun!

Downsides: all our RoadsterSport brand systems are higher grade higher cost all polished 300 series stainless end to end. Like other Magnaflow products, this SystemOne is almost all 400 series stainless so we don't bother to polish it all (the gorgeous quad tips are still 300 series with full polish because that's the only part you see regularly). The 400 series stainless will develop a thin rust coat immediately, though upside is both less cost and higher carbon content for even more strength so it will easily outlive the life of the car.

INSTALL TIP: Notice the flanges on the removeable midpipe resonator/straight pipe are asymmetrical, how you put that piece in makes a difference in pulling the entire midpipe toward the driveshaft or pushing it away from the driveshaft. So, twist that section in place before you lock it down and watch the effect on lay of the midpipe. Do NOT use header wrap on Crosspipe, it will create a fitment issue and degrades the stainless material.

Video below from driver's seat and rear bumper, both with resonator installed (not having it installed raises the volume but doesn't change the character).

Customer Jacey Cobb's install of our complete 'System One' exhaust leaving the starting line at BMW Club Autocross Event! This is with the quick change resonator removed....plus the optional Crosspipe.

Fantastic Installation Video by our dealer and friend Bryan at NGEN Customs and Performance:

Customer install of basic "SystemOne" with stock crosspipe, and the removeable straightpipe section installed.

with resonator installed instead of straight pipe: