MORE product details for the - RoadsterSport Super Street MX5 Exhaust ND Model GR-030

We outfitted our ND model MX5 with a computer and sound analyser and microphones and drove it under varying conditions and loads with and without muffler. We then use that data and some special software to calculate the particulars of the Helmholtz chamber to precisely knock down the frequencies we do not want to hear in the car while allowing the good throaty burble sounds to pass through. In brief, awesomely loud when you want it, and super mild when just cruising.
All this in a muffler weighing just over 6kg, almost 3kg saving over the factory muffler.

Ride Along with our RoadsterSport Super Street in a Launch Edition owned by local customer Mark Booth below, big thanks to Mark for the great video!

All POLISHED stainless steel construction. Uses stock hangers and connects to either our RoadsterSport mid-pipe or the stock mid-pipe.

The SOUND level is Adjustable by YOU, includes removable cone baffle insert in the tip that helps YOU select final sound level, baffle in for reduced sound level, and baffle out for more sound...and just one bolt under the tip to make the easy change. OPTIONAL packed baffle cuts the sound even more if you want...but most won't!

Made in the USA...with a LIFETIME WARRANTY!

BRIAN'S APPLICATION NOTES: Mild when cruising on otherwise stock ND, delivering a classic sports car BARK and THROATY RUMBLE when you wind it out to redline, lots of burble when just playing with the throttle around town. Result is TONS of fun, will make many of you laugh out loud. You also get the best performance from the straightest and cleanest flow out the exhaust cutout you can get, and much lower weight. Nonetheless, this choice is NOT for the faint of heart!!! The most common question we will get on this one is: "will it be too loud" and we cannot answer that one for you because the "right" sound level is a matter of entirely subjective personal preference. However, if our RoadsterSport SuperQ is 10 to 15% more sound than stock (depending on use of removable baffle), and our ND RACE is a full 50 to 55% more sound than stock when on throttle, and this ND STREET is the middle choice at about 35% over stock sound level when on throttle hard, though perhaps just 15% over stock when cruising home in high gear and low rpm’s.

BRIAN'S INSTALL NOTES:

Installation of this MX5 exhaust is SUPER EASY...just two 14mm bolts to loosen! When you open the big box you will find separate foam wrap on the exhaust tip, leave that foam around the tip during your install to protect the polished tips and your car's soft plastic in the exhaust cutout. Use gloves. Note the 'bolts' from the factory are actually studs with springs and nuts and the factory usually jams the nuts on so hard that unbolting it will bring the stud out too. If that does not happen then use 13mm long socket to unscrew the studs (or use jam nut technique where both nuts are put on one stud against each other and then wrench used on the inner of the two to back out the stud). Then lube up the stock exhaust hangers with dish soap and yank stock muffler back and forth to work the soap into the rubber hangers and then the muffler will slide off those rubber hangers easily. Then hang the new muffler on the wet and soapy rubber hangers and torque 'bolts' with the springs back in place to 30ft/lbs. Now you can remove foam tip wrap. Option to remove the baffle too, to do so loosen bolt that holds it from under the exhaust tip and use it as handle to shake the baffle loose and then unscrew bolt the rest of the way and pull the baffle (pulling baffle raises the sound slightly). Note the muffler to mid-pipe joint is a ball socket connection for the first time on a MX5, it is designed to move a lot, so please do not add sealants that will gum up that dry ball socket joint.