Hi there dose any one know if you need a exhaust guard for the IVA test and if a robin hood exhaust would pass the sound level test of 99ba.

I passed SVA with 1 db to spare on a RH exhaust on a pinto.

I passed sva with a Martin Keenan exhaust aka mkengineering

92db it was also a pinto exhaust

I have a 2 litre cav engine and the new level is 99ba any idear.

You don't need a guard for the exhaust as long as the exhaust itself doesn't have any non-compliant edges. Youa re probably going to fail anyway, so paying out for a new silencer just because it might fail is probably more expensive than a retest at £90, when you will know for sure.