AFE Stage 2 XP or AFE Big Boost?

Hi guys,

New here and I noticed in the "How-to" threads that the recommendations from Diesel Innovations for all of their different hp levels start with the AFE Stage 2 intake.

However, the AFE Big Boost seems to flow more air (about 300 CFM more), and is clearly much less.

What's the better intake system? What's the best one available now, if neither of these are it?

Thanks guys.

i think the best is s&b intake setups, but if you have the done the DIY intake then the big boost is better

steele86 said:

i think the best is s&b intake setups, but if you have the done the DIY intake then the big boost is better

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Thanks for the reply. Who's got the best pricing on those intakes? Do they have different ones (Stage I, II, etc)?

just go to any diesel performance place on the web. i'm not sure that i can tell you the names or put pic on here cuz of the sponsor that we have on here

I have some of the best prices on those intakes as well as the Big Boost from AFE which I run on my truck. I'll PM you.

steele86 said:

i think the best is s&b intake setups, but if you have the done the DIY intake then the big boost is better

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Intake temperatures show a different story... The open bottom of the S&B box sucks A LOT of hot air off the engine and exhaust manifold...not a good thing.

JDub said:

Intake temperatures show a different story... The open bottom of the S&B box sucks A LOT of hot air off the engine and exhaust manifold...not a good thing.

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Do what? There isn't an open spot on the bottom...

Actually if you want the best flowing and filtering intake get a Tymar..have a big boost here that dusted a turbo that I'd bet the customer would sell ya..

the paper filters like tymar and the nape...ect are **** i had one and that piece of **** dusted compresser wheel and brand new housing and who know what else. go with the afe 5r or 7 pro

There is 100s of people running the paper filters and haven't had a problem. Sounds like you didnt have a clamp tight enough to make the seal.

My tire went flat and my oil was dirty 3 weeks after I installed my AFE Big Boost... I was pissed.

JAP said:

My tire went flat and my oil was dirty 3 weeks after I installed my AFE Big Boost... I was pissed.

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Maybe you didn't oil it right lol

JDub said:

Intake temperatures show a different story... The open bottom of the S&B box sucks A LOT of hot air off the engine and exhaust manifold...not a good thing.

Click to expand...

What story is that? At IDLE in 100*+ ambient temps my underhood temps are about 30* warmer, but on the highway they are within a few degrees of ambient. Any idea what the post CAC temps are? Would even 30* higher on the intake make a difference in performance??

You could always get a TAG to make up for the lost performance!! :thumbup:

I have a factory-stock turbo w/over 300k miles that I put 200k miles on with a 6637 filter - it has no evidence of 'dusting' and I never had a UOA that indicated poor filtration. This type of filter may have some drawbacks - but IMO lack of filtration and hot air are not among them.

I've been running the AFE Stage II for 7 plus years now. Every time I clean it I take my hand and stick it up the intake pipe and it come out bone dry and clean as a whistle. Sure there are many to choose from but if you are specifically looking at a stage II, I have nothing but good to say about mine.