FREQUENTLY ASKED QUESTIONS:

RESONATOR

What is a resonator, and do I need one?

A resonator is critical for a street-driven car. Here are some basic, layman’s term explanations:

There are 3 common ways to reduce sound in an exhaust system: Resonator (reflected waves), muffler (wave absorbtion and reflection) and silencer (reflected waves and restriction). BRM uses a resonator and a straight-through muffler on all of its systems.

A resonator is a straight-through chamber sized larger than the inlet / outlet. Tuned properly (through placement, diameter, length, shape and location) it will actually cancel out certain frequencies as the sound waves collide, yet does not impede flow.

MUFFLER

A muffler is a chamber with internal walls (think of a maze) that the exhaust gasses travel through. As the waves pass through, they are disrupted and “chopped up” and the sound is absorbed by the surrounding packing (think of an insulated room). These can be restrictive depending on design – if it’s a straight-through design, it will not impact flow, and primarily serves to “fine tune” the exhaust note.

We don’t sell mufflers, resonators or components individually.

SILENCER

Some systems on the market are manufactured to use a silencer. A silencer is a conical obstruction placed in the exhaust system which reflects sound waves back against themselves, cancelling certain frequencies, much like a resonator. But it also works by restricting the amount of flow, thereby reducing sound levels. You may as well shove a potato in your tailpipe and bore a small hole in it. If you’re considering a system with a silencer, do yourself a favor – Save your money and keep your stock system.

PIPING

What size tubing should I get? The most commonly-asked question by far… Short answer: Nissan 4-cylinder engines both function VERY well with 2.5″ exhaust. Many will tell you that a turbo car needs a 3″ exhaust to function properly, to which we say, not necessarily true.

Keep in mind that 2.5″ is a significant increase in size over the stock system, and there are far less bends / restrictions in our system. Unless you’re pushing 400+ hp, or more than 12psi, there’s really no need for 3″. However, we understand that some folks prefer a larger pipe diameter, so if that’s what you want, then we’ll build it for you!

GASKETS / HARDWARE

All gaskets and hardware that you’ll need to install your system will be provided. We recommend replacing your rubber hangers if they’re stiff, dry or brittle. Those are not included, but can be purchased at most local auto parts stores for a few dollars.

DELIVERY

At present, we’re taking about 8 days from the date of your order to delivery. Sometimes we’re quicker. If at 8 days you don’t have your package, please let us know. There’s simply too much email flying back and forth to provide everyone with frequent updates before 8 days, however. If you have special delivery circumstances or instructions, please email us when you place your order.