sounds like you could have worn rings, recheck and see if your smoke is black or blue-grey. if blue-grey(burning oil) I would check the compression in the cylinders you found oil(white crust on the plug) if you have wet oil on the plugs it is almost always external, I would change the valve cover gaskets. if the noise is a nocking type sound it is time to replace you short block. good luck!!!!
No. have exhaust checked/repaired
For cutting exhaust pipes, the proper tool is definitely better than a sawzall.
back struts are bad or exhaust is loose
check the exhaust system for loose mounting clamps. Check the shock, springs, and bushings. also check the gas tank straps. If the banging is when the gears are changed from park to reverse, recheck the u-joints, at the ends of the drive shaft. Brakes can sometimes make a banging noise. if not these then look for loose nuts, bolt in the area of the noise. then the sound may be coming directly from the the rear end or the transmission. hope it helps. duboff
To route harmful gases to the rear of the car after the catalytic converter has cleaned up the exhaust as much as possible. Also the muffler is used to quite the exhaust.
Bad shock mount? Loose exhaust system?
The white smoke out of the exhaust will indicate a head or a head gasket issue. the only way to tell is to pull the head and inspect for signs of a bad gasket and have the head cleaned and checked for cracks or warping.
no lol its just louder it adds 50 hp what if the twin exhaust is the some size of the single exhaust
If the leak is against the head, it can burn tracks into the exhaust port faces as if done by a cutting torch.
Probably a bad exhaust pipe and/or muffler. Have it checked.....
That could be a leaking exhaust system. A leaking exhaust system is very dangerous! Please have it checked out ASAP.
In theory, removing the exhaust pipes or cutting holes in them could increase the gas mileage. However, in most states it is illegal and could cause damage to the valves inside the engine.