What can I upgrade my intake manifold for?

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From a performance point, the plastic intake is actually better than the aluminum. The runners are smoother and the manifold weighs a lot less. I don't know of a better performance intake available for the transverse-mounted, QR25DE. Maybe someone else on the forum knows of one?

Stuard0915 said:

I have a 08 Nissan Altima 2.5 (please don’t laugh) and it’s my daily driving, but I just wanted to make a couple of upgrades to this car. I’ve been looking in forums to see if anyone has upgraded their upper intake before of just swapped it for a aluminum one (i just really hate the plastic one that it has right now).
So, can anyone suggest me something or help me with that?

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I found the air filter (K and S?) change to an oil filter increased my performance on mine (it has the same-ish engine but 2014). I used Amazon.ca : K&N Filters.

Stuard0915 said:

I have a 08 Nissan Altima 2.5 (please don’t laugh) and it’s my daily driving, but I just wanted to make a couple of upgrades to this car. I’ve been looking in forums to see if anyone has upgraded their upper intake before of just swapped it for a aluminum one (i just really hate the plastic one that it has right now).
So, can anyone suggest me something or help me with that?

Click to expand...

If you're looking for performance improvements, invest in a good high flow custom CAT-back exhaust system; you'll notice improvement in the mid to high rpm ranges; plus it'll sound good. Forget about any improvements in the intake system; it's highly tuned as it comes from the factory. If anyone recommends a custom cold-air improvement package, that's also a waste of money; the factory cold-air intake system is excellent.