[martrogers]

I had a local company of "exhaust experts" install my system comprising of cat and muffler on each side and a tail resonator. I made it clear it needs to pass engineering at current sound levels.

Anyway, started the motor last weekend and whilst the sound was fantastic I fear it is too loud for engineering (and possibly the neighbours).

Does anyone have any tips for mods to quieten it down for engineering, I have limited space for additional mufflers but I could perhaps modify or replace the resonator which I suspect isn't doing too much for noise reduction.

Can restricting the exhaust damage the motor?

Any advice appreciated....

Mart