Which K&N Air Filter should i get? The 12x2.5 in. OEM replacement element or a 14x3 drop base air cleaner?

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1987 Camaro Sport Coupe 305 V8 LG4-rebuilt-All Stock.

Future Mods: Flowmaster American Thunder 3 in. Cat-back, Catco High Flow Catalytic Converter, Hooker Super Comp Shorty Headers Jet Hot coated, K&N Air Cleaner, CompCam 264H, White Paint, IROC wheels, Alpine CDM-7871 CD player, Polk Audio speakers, Grant GT Rally Steering wheel,New Fuel Pump, Ground Effects, B&M Megashifter

 

This topic get a lot a play here. I don't know what intake you have, carb or throttle body. It seems that most of the people here use the 14x3 air cleaner. I got a 9x3 because I wanted more of the top of the engine to show. If you have a throttle body, there is a spacer ring on top of the throttle body. Remove it, and the 3" filter clears your hood no problem. Be sure and get a flat base air cleaner.

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'92 firebird t-tops
305tbi,670cfm tbi, 2 1/2" Dynomax catback, 9x3 K&N open element

 

our cars only had 12x2.5 or whatever cleaners???

 

First, i have an all stock LG-4,which is a carbed motor.

Yes, our cars came with 12x2.5 cleaners...Inside the snorkle cleaner assembly.

Would a drop base be more efficient? Im thinking about going with an Edelbrock Performer or Weiand Stealth intake.

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1987 Camaro Sport Coupe 305 V8 LG4-rebuilt-All Stock.

Future Mods: Flowmaster American Thunder 3 in. Cat-back, Catco High Flow Catalytic Converter, Hooker Super Comp Shorty Headers Jet Hot coated, K&N Air Cleaner, CompCam 264H, White Paint, IROC wheels, Alpine CDM-7871 CD player, Polk Audio speakers, Grant GT Rally Steering wheel,New Fuel Pump, Ground Effects, B&M Megashifter

 

TTT

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1987 Camaro Sport Coupe 305 V8 LG4-rebuilt-All Stock.

Future Mods: Flowmaster American Thunder 3 in. Cat-back, Catco High Flow Catalytic Converter, Hooker Super Comp Shorty Headers Jet Hot coated, K&N Air Cleaner, CompCam 264H, White Paint, IROC wheels, Alpine CDM-7871 CD player, Polk Audio speakers, Grant GT Rally Steering wheel,New Fuel Pump, Ground Effects, B&M Megashifter

 

This just my opinion, but after racing for quite a number of years, even if it was 25 yrs ago, it seems like the thinking has always been that the more free space for breathing above the carb, tbi, injectors, etc., the better the engine breathes. Better air flow into the intake and such. Not to mention the extra surface area a taller filter gives. A drop base would be trying to pull air from below the top of your carb. Can't be to good for smooth air flow. I'm certainly open to other opposing ideas, never have been able to know everything.

 

i imagine drop base is only for applications where the clearance is needed...

 

You could always put an air Xtreme lid on it, K&N's filter lid, that would provide air coming from the top straight into the carb.

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1989 Trans Am GTA

 

unless you have an open scoop and are afraid of water, like me