The amount of horsepower you gain from an aftermarket intake varies, on average though you will gain... 5 - 15 HP ...it is VERY rare to see over 15hp from an intake, if someone tells you otherwise I would be cautious.
3-5 horsepower
Possibly,due to the better design of most aftermarket intake manifolds Also, an aluminum intake saves about 25 lbs., so a car would be faster if it's lighter.
From 5 to 10 horsepower.
In diesel engines, yes. In gasoline engines, not much.
Depends on which cold air intake you install. Some years back, SCC did dyno testing with a wide range of aftermarket short-ram/cold-air intakes. I believe the highest horsepower gains were attained with Injen and AEM. During the warmer months, an advantage of using a cold air intake is to prevent horsepower loss from elevated engine bay temperatures.
install aftermarket mods such as air intake, exhaust, and even turbo down the line if u feel inclined to.
you wont gain any horsepower, you will just gain more noise
10 horsepower.
about 2 wheel horsepower
A 2000 RMX 250 has a horsepower of 58. This is based on the basic edition motorcycle. Should aftermarket performance parts be added the actual horsepower of the motorcycle will increase.
aftermarket intake (K&N, for example) and aftermarket exhaust system are the two easiest ways. you could also... install a turbo or supercharger use a 'powerchip' type computer upgrade
God, where to start? there are a LOT of things you can do to add horsepower. How much money are you looking to spend? here's a list of things you can do: cold air intake, swapping exhaust manifolds to headers, changing to a high flow exhaust system, turbo/supercharger, nitrous, aftermarket computer chips, lightweight camshaft gears, bigger camshafts, bigger engine, aftermarket clutch, aftermarket torque converter, etc.etc.etc.etc. There's a helluva lot you can do. It's all in how much money you wanna spend. Agreed. LT headers/cold air intake/catback/tune REALLY wake these bad boys up though