Yeh you don't need to secure it really, it won't move once its installed.. The most important thing to do is get rid of the rubber pipe going from the filter to the turbo inlet. Changing this to hard pipe makes a difference to heat and compression.. The filter and intercooler upgrade is the best thing you can do to your engine, the heat going into your engine is reduced alot. Doing this upgrade tho is useless performance wise unless you have a snorkel to act as a ram type intake system.. If you watch YouTube mighty car mods did a dyno test in a skyline showing this fact so as far as performance goes you need to have a ram style effect to gain horsepower but in saying that lowering heat is always good for your engine.