Which air lid to buy?

[blownh2x]

What is the best air lid for me to purchase? already have the K&N filter. 99 Firehawk

[Mustang Killa]

Well I have the SLP lid, I'm not really happy with how it fits..I think there is an SLP lid that was availible through GM that was an option on your car (firehawk) in an upgraded SLP package because I know there were different SLP options/trim levels for the firehawk..I'm guessin if you could track one down it would be a much better fit..so it will probably depend on how much you are willing to spend..

[blownh2x]

I was looking and leaning towards the slp lid but there are a couple out there. which one has the most hp gain?

[StuntmanMike]

There was a magazine article done on this topic a few years ago, IIRC the SLP made the most power.

The article is still floating around on the web somewhere, it might be on the GM High Tech Performance site.

[whitelj]

The SLP is suppossed to do 8 rear wheel, but don't fit properly. Looks sharp though.

[blownh2x]

ordering a slp lid now

[jag42420]

http://www.motorsporttech.com/fbody_air_intake01.asp Click the HERE link to see the article.

Here's the page you're looking for:

[blownh2x]

Thanks for all the help guys.

[ArcticZ06]

I thought Firehawks already came with an SLP lid?

[jag42420]

I thought Firehawks already came with an SLP lid?

SLP Firehawk Package (From a March 1998 Road Test done by Motor Trend):

Level I - SLP body package (exposed headlamps, SLP hood, SLP exhaust system, and firehawk 17" wheels and Firestone firehawk tires)

Level II - Same as Level I + Performance suspension (Bilsten Shocks, variable springs, and a larger anit-roll bar), Auburn differential, Hurst shifter, lumbar-adjustable seats, firehawk floor mats, synthetic power-steering fluid and differential lube.

Level III - Same as Level I and II + SLP spoiler

C/D Test Results:
0-60......5.0 sec
1/4-mile.....13.5mph @ 106mph

Power......327 bhp @ 5200 rpm
Torque.....345 lb-ft @ 4000 rpm

[blownh2x]

Mine is a 99 and it has the stock air lid. I have the bilstein suspension, exhaust, lowering springs, shifter, lumbar adj seats, chrome wheels, hood.

[Kup98ss]

newly designed SLP. Mine fits great. filters better than my stock lid as well.

No dirt past filter.

[sunsetorangess]

Throw the K&N in the garbage, pick up a paper filter and just about all lids are the same. Good info JAG.
J

[jag42420]

Throw the K&N in the garbage

Someone on here or on LS1tech did a rear wheel dyno comparison of a full bolt on comparing the K&N to a Fram. The Fram dynoed 2HP more consistently. I'll see if I can find it...

[sunsetorangess]

Someone on here or on LS1tech did a rear wheel dyno comparison of a full bolt on comparing the K&N to a Fram. The Fram dynoed 2HP more consistently. I'll see if I can find it...

Personaly iv seen nothing but headaches with K&n filters, Ie Garbage getting through the filter, too much oil, straight out of the box, Throwing codes and vehicles running like poo becaue it Got the Maf with some oil.
J

[jag42420]

From:
porsche914ls6
Junior Member
Join Date: Jan 2006
Location: minneapolis
Posts: 21
74 Porsche 914 LS6 500HP
white
K & N filter myths
--------------------------------------------------------------------------------
"I went to Doug Rippie Motorsports recently to have my trick LS6 tuned on the dyno. Doug asked me if I wouldn't like to put a K & N filter in for a few more HP. I said "I'll buy it if you can show me on the dyno that it improves HP by at least 2 HP". So...with a baseline of 434 RWHP, we installed the K & N filter...did another dyno pull to see the improvement and wallah....A 2 HP DROP! I pulled the filter out of the car and slammed it right back in the box and said "I appreciate the effort...but it apparently flows less than my Fram cheap ass filter". We made a few more pulls and HP was back up 2 HP with the Fram. Lesson: Don't believe everything you hear."

And here: http://forums.corvetteforum.com/show....php?t=1472226

[blownh2x]

The K&N was in my car when I purchased it so maybe I'll get the Fram now after reading this.

[ApexVIII]

i have SLP it fits good, not great but good

[dlbrando]

My slp lid fit ok, it fit much better after I took the foam insulater that comes with a k&N filter and stuck it to the air lid. Works much better now