Ultra Quiet Resonator, 3" inlet/outlet

Cruise-speed drone is the most common complaint after a cat-back or straight-pipe build, that steady boom in the cabin around 1,800 to 2,200 rpm on the highway. Vibrant designed the Ultra Quiet Resonator for exactly that problem on six and eight cylinder engines. Its body is a flattened oval with far more internal volume than the small round bottle resonators most shops use, and that extra chamber gives the sound absorption material more room to work on low frequency drone.

Construction

Inside is a straight-through perforated core, so the resonator adds no meaningful restriction to a 3-inch system. The core is wrapped in multiple layers of sound-suppression material, and the whole case is T304 stainless with a mirror polish. The inlet and outlet are centered on the body, which makes it easy to fit in the straight section of a single 3-inch pipe.

Dimensions

• Part number: Vibrant 1142
• Inlet/outlet: 3 in., centered
• Overall length: 13.75 in.
• Body: 6.5 in. x 4.75 in. oval, 9.75 in. long
• Material: T304 stainless, polished
• Warranty: 5-year limited

Installation Notes

Placement changes the result, so if you can, clamp it in a couple of positions and test drive before final welding. Hang the resonator so the pipe joints are not carrying its weight, and back purge when welding the stainless joints.

Frequently Asked Questions

Will it make my exhaust quiet overall?

It is aimed at drone and harsh rasp rather than overall volume. You will still hear the exhaust under throttle, with less boom at cruise.

Will an oval body fit under my car?

At 4.75 inches thick the oval case often fits where a round 6.5 inch body would not. Measure your clearance at the planned location first.

How does it work on a dual exhaust?

Run one in each 3-inch pipe, placed at the same point on both sides so the two banks sound even.

Fitment: Universal. Confirm the sizes and thread types listed above against your application before ordering.