NGG

What are the cylinder shaped thingys (like a hockey puck, only thicker and smaller diameter) that are mounted on the brackets at the front of the mufflers. What function do they serve.

isam250

iTrader: (7)

its a counter weight blance thats what i heard

lobuxracer

iTrader: (2)

It's called a damper. This means it is a noise reduction device.

isam250

iTrader: (7)

ooops i guess i was wrong from what i heard =X

NGG

Thanks. CL wins again.

ben_r_

Huh, so what does it sound like if you remove them?

SonnyIs350

^^^^ Probably rattles

SPEED&ECO.

someone try it!!!

lobuxracer

iTrader: (2)

Exactly. These devices are common on engine mounts for four cylinder engines. If you remove them, the noise from the engine bay can be really annoying. Trust me, they don't put anything on the car that doesn't have to be there. The accountants make very certain of this in the final design phase.

Lexmex

My RX300 had two of them, one by the main cat and another one further back closer to the fuel tank. I removed them just before I decided to do all of my wacky exhaust modifications, but didn't notice much of a change in tone.

lobuxracer

iTrader: (2)

They typically work at a specific frequency. You may not drive at that rpm so you don't notice it. If you hit the resonance point, it's LOUD. At least it was in the Scion.