OK to be honest.....if you are going to boost HP/Toque/Mileage past the current conditions your would have to go from the heads back. Guess what? GM took care of that! After market systems will give boost to the point that unless you are going to go past 500K it will never pay for itself. You have to make an engine work less to produce HP to gain a great deal of improvement.
You will find that a lot of people claim great improvement after spending a great deal of money but it is only a claim!!!!!
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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