sleeper

What I don't get tho is the K&N is like a poly plastic, like the stock hhr air box, but stock box has no drains..

I can understand the GMPP CAI being made out of steel..

843de

Good question, maybe they copied a GMPP intake without realizing that condensation in a plastic intake is not too likely. I've not been that impressed with K&N stuff over the years, especially the habit of shipping "over oiled" filters which go straight from the box onto the engine, followed shortly thereafter by the codes set as the MAF sensor goes bonkers from getting "lubed".

sleeper

Maybe, actually I think the poly plastic is a better choice for materials..

Can't rust, less heat soak than steel & lighter. Just sayin..

I ran a drop in K&N in mine for a long time & not a problem..However I did wash off some of the excess oil first...

& the only air filters I use on the bikes.

843de

Maybe plastic is the overall better material choice, but I think the steel construction of the GMPP intake contributes to the sound, and I like getting something substantial for that kind of money.

"However I did wash off some of the excess oil first".....that's a key statement, I've seen K&N filters that just about dripped oil on the floor when taken out of the box. Could be that they over oil them thinking that some will be lost due to evaporation/wicking if the products sits in stock for a long time.

I agree, for a Harley, there probably isn't a better filter made.

bugflipper

At the radiator there is a plastic lip to block air from going into the engine bay. On mine directly in front of the tube that goes to the throttle body, where the hole is. I cut that little plastic channel to let cold air feed the hole in the k&n. Made a plate to jump the gap between radiator and engine. It was mounted under the kn box. The front rests on radiator support with weather stripping under it to prevent scratching. The holes in the bottom I filled. Can't say it added anything, but running header and several other things, so more cold air can't hurt.

Joshua022

Could you post a picture please?

panelmoxie

you guys are making me feel smarter for not getting k&n. which i have almost ordered for all my vehicles 100 times. I love the lot of ya.

sleeper

"GMPP intake contributes to the sound, and I like getting something substantial for that kind of money".

Mike- I still feel the GMPP CAI is the "best looking" production made set-up out there..

A little thermal insulation under the floor would be a plus, imo as well.

Dzazueta

Do you still have roof racks? If so do you want to sell them or just give them to another hhr owner who needs them, og coarse I will pay shipping
Dzazueta@comcast.net

MiamiHHR2012

I installed the K&N "box" this past weekend. The engine bogs, a bit, until you get to 3k, then the power increase is quite noticeable. I imagine that the "bog" could be easily resolved with a Trifecta tune. (More air needs more fuel.)

Concerning the holes, at the bottom of the box and the fact that it does not hermetically seal the filter I will say this: you only need a sealed intake in a ram-air setup. The K&N box's function is to dampen the noise. Overall, I think it is the best K&N setup I have bought and I have bought a few, over the years.

My humble opinion, Gents.