I’m thinking of having my rear silencers removed and replaced with straight through pipe. Has any one done this, what does it sound like after ? 3.2 6 cylinder

 

would it be better with aft cat ( referred to as mid cat ) removal and rear silencer substitution with a different product like Quicksilver ?

Would this effect the local countries emission test where it could not pass ?

This is a quicksilver installation on a 4.0 liter with a Andy bracket advancing the crankshaft timing mark 5 degees to bias the ECU for better engine performance ( low end gains )

I am assuming the kit included the mid cat

 

same car as above..
which is my car by the way 😀

 

often wondered what it would sound like and i'm sold. on the to do list...

 

Horses for courses I guess. Personally I love the silence from my 3.2 - yes it does have some exhaust noise under heavy acceleration but I love rolling around in it under light throttle where you hear nothing but the grit in the road crunching under the tyres!!

 

I don't recommend it because your engine is designed to run with all of your exhaust system gadgets in place.

Taking them out can alter the amount of back-pressure your engine's fuel system is designed for and alter your engine's fuel/air moisture and mess up the sensors associated with the intake/fuel injection and exhaust systems, basically throwing things out of balance.

As an example, I had a friend who tried removing his rear silencer from his Volvo, and in addition to making his car more of a noisy nuisance, it became harder starting and simply did not run right on a cold engine.

 

I once removed the rear silencers and drove it to see what it sounded like - droned terribly at steady speeds. Now I have no downpipe cats and a 3" section going past the gearbox to the point where it splits with two magnaflow cats then the rest of the system is standard. Sounds ok, purposeful but not annoying. Personaly from my experience playing with mine, I think its better to keep it quiet and maybe open up the intake for induction noise / supercharger whine instead.

 

Just like JohnXJR6 I did this to my 4.0 sport, when I had a stainless system made. I loved the sound it made but at somewhere round the 60/70 mph area the drone was terrible, up to that point , great, but as i spend a lot of time at motorway speeds it was just too much so I had them put back in.

 

I think the first ones are mufflers to make less noise, and the rear ones are resonators to remove the drone at speed, as noted above.

 

My rear silencer was blowing so removed and replaced with pipe.
Idle / start up and some engine speeds sound amazing but at some speed there is terrible drone.
undecided if it is improvement or ruined ?

 

Wow. That exceeded my expectations. However, I am finding Quicksilver system/part # JR057S is no longer available. Perhaps you can clarify what the changes are compared to stock???