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Old 04-01-2013, 08:21 AM
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Rockman Rockman is offline
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Join Date: Aug 2004
Boat: '95 BF200 Yamaha ProV 200, '94 PS190 LT1 1:1
Location: SW Burbs of Chi-Town
Posts: 3,413
Originally Posted by CantRepeat View Post
I'm late to the party on this and did not read the entire conversation. So if this has already been covered I'm sorry for a repeat.

It has been my experience that, if you remove the hose coming from the valve cover you must have a breather type vent. It allows the crank case to ventilate and if you close it off you will create a ton of back pressure that will sure blow out some seals. A lot of times those breather caps with no hose will spew out oil at higher RPMs.

Yes, if the flame areestor has a vent, you must replace it with one with a vent. You should replace with the same kind.

I got the slim down version without the vent as this replaces the one that was on the LT1 originally.

K&N 59-5020 K&N Flame Arrestor
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