View Full Version : What Air Cleaner for 427SBF and ProFlo4
gbranham
03-11-2025, 09:32 AM
So, I'm at the point where I need to order an air cleaner for my build. Boss 427 and ProFlo4 EFI. I've read that a K&N Xtreme 14" drop base is a good unit to clear the hood and to provide enough airflow for my engine. I'm concerned, however, that a drop-base will interfere with the ProFlo4 throttle linkage and Forte mechanical throttle bits on the driver's side. If anyone with experience here can help steer me to a good solution, I'd appreciate it.
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Thanks,
Greg
Gordon Levy
03-11-2025, 10:57 AM
14" round, 1.5" drop base, 2 3/8 element, filter top.
gbranham
03-11-2025, 11:53 AM
14" round, 1.5" drop base, 2 3/8 element, filter top.
Well that was easy. Thanks, Gordon! The K&N 66-3040 is close to that spec. Would that work, or look for something closer to your measurements?
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Greg
tnt_motorsports
03-11-2025, 06:35 PM
For me personally, I would steer clear of an oil filter, I'd use a regular paper element. I have used oil filters in the past on other vehicles and it makes the intake a mess over time.
cc2Arider
03-12-2025, 11:32 AM
Hey Gordon,
Is that the same recommendation for those builds that have your solid engine mounts (drops engine about an inch or so)?
Craig C
Gordon Levy
03-12-2025, 01:23 PM
yes