The money you spend to purchase your car only represents a portion of the cash outlay necessary to keep your vehicle running properly. You’ll also need to allocate part of your budget to periodic repairs and replacement parts. Both are inevitable.

The driveshaft carries the power to the axle which is connected to the wheels. It has several joints which make the axle and wheels moveable as the car drives on uneven and bumpy roads.

Efficiency controls both horsepower and MPG. Efficiency is increased with a longer burn time, A.K.A. flame propagation, in the cylinder. Water vapor injection slows the burn time the same as paying a higher price for higher octane at the gas pump.

Drivability is not adversely affected. Interior noise level depends on the exhaust system you choose. Some will make it far louder; some will actually make it quieter. But most are just a little bit louder than stock. But the added dBs are also combined with a MUCH sweeter exhaust note, so it’s definitely worth it. And the interior of the Supra is pretty quiet anyway, so on the highway, it will be VERY livable. As far as low-end power goes, the down-pipe will greatly decrease Turbo Lag. So low-end power and response is much improved over stock.

The first thing to do is to lift the car using a jack. Set the stands on all the corners of the car. Make sure that you set the car high so you can work comfortably and use the reciprocating saw. You have to wear protective glasses as well as ear plugs to protect your eyes and ears.

There are many other components and systems that suffer wear and tear, and eventually need to be repaired or replaced. For example, your car’s engine should operate smoothly for over 100,000 miles, but that will depend on your driving habits and diligence in changing the oil. Your catalytic converter recycling should last over 150,000 miles, but a rich fuel blend in the engine can shorten its life.

Of course there are other car repair diagnostic problems that can trigger the warning light to come on and you need to pay attention to how your car is operating to decide what the best course of action to take is. Does the warning light flash on and off depending on whether you are driving in the city or on the freeway? When the light is on, does the car drive differently?

The best cat-back systems are made with stainless steel and have a lifetime warranty. In this category you can find systems with less restrictive mufflers. These mufflers will regain some lost horsepower that the stock muffler took, because of its internal design and the backpressure it developed. Some are called “glasspacks” and others are “straight through” designs. You can also find systems that lower the sound frequency and give you a deep sound that is not normally found on the typical four or six cylinder engine. And of course you can find systems that have a giant tail pipe tip. It looks impressive, but for practical terms does not do much for your car.