Quote:
Originally Posted by KirkEvil
Being an engineer does not mean you automatically design/build great things. You could give the best engineer in the world a weak design budget and get a poor product. Stock parts are made for stock applications, under a budget...hopefully designed as best possible for that budget. If everything stock was made/designed/built to work well I guess there wouldnt be any performance gains with aftermarket parts?
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While I agree with your points you have made good sir, I will say that stock parts are designed for longevity and passing certain tests, IE safety and emmisions being the big hitters. I can guarentee OE stuff goes through a much more rigorous vibration and expected life span design process and test procedure than say coated pacesetter headers etc.
Now, aftermarket parts sacrifice this in many cases, with removing the cars origanal ability to A) run for an almost indefinite period of time without the need for adjustment, or replacement B) Pass all inspection tests assuming the state actually performed safety and or emissions testing
Most middle of teh line aftermarket parts will not last nearly as long as OE stuff before they start to wear out, or even worse fail. Newer engines, GM V8 wise are coming with more efficient exhaust manifolds and other parts, so the aftermarket for that niche may need to work harder to justify the need to replace stock parts anymore.