a pacesetter header will help free up some horsepower, a muffler won't do much if anything at all, the rest of the exhaust pipe from the catalytic converter back needs to be replaced with larger diameter pipe as well.
One way to increase the horsepower of your car is to get rid of its stock muffler and replace it with a straight-through muffler. They are designed to keep the car quiet, but the rob it of horsepower. Another way is to buy an intake kit that will draw in the coldest air you can get.
on the muffler
About 3-5 hp
no it doesn't but power flow out to waste
Exhaust components rust out over time due to weather and the heat from the vehicle. On a 2001 Chevy Cavalier, when the muffler strap rusts, welding a new strap in its place will offer a complete and reliable repair.
Muffler Heat Sheild
form_title=Muffler Replacement form_header=Help restore exhaust flow, horsepower and performance lost due to a damaged or malfunctioning muffler. What is the year, make and model of your vehicle?=_ Have you ever had your muffler replaced before?= () Yes () No () Not Sure What prior work have you had done on your car's muffler and exhaust system?=_ What are your hearing or seeing in the car that is abnormal?=_
smoker.
There's no such thing as a "muffler bearing" or for that matter a Dodge Cavalier. Summer and winter air? Yeah right. Me so gullible! Someone is pulling your leg, you should however, check your tire pressure monthly.
Try cutting the low side of the cam off. Run octane in it. A cirled muffler that looks like a circle adds horsepower ( or any muffler thatholds back pressure). And tilt it 7 degrees forward. And Put a motorcycle carbuetor on it with an air filter.
no *Correction - Reduced back pressure does usually result in more horsepower. Some cars run with resonators rather than mufflers which reduces the noise without as much back pressure, thereby increasing horsepower.
A fouled plug, bad plug wire or bad coil pack.