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I ordered velocity stacks for my 2.4 merc. They should be here Monday. Do they really make any difference at all Also thinking about a Holley Blue ele. fuel pump. Any input if it makes a difference from the $30.00 Auto Zone fuel pump I'm running now.

I don't think the velocity stacks will make a difference but I have never tried myself so keep us posted.

The Holley blue pump puts out too much pressure and will need a regulator. As lonk as your pump is keeping up it will be fine.

Thanks I'll try them out next week and see what happens. For 65bucks and 15 min. to bolt them on it's worth a shot if it gains 1 mph.lol

I got the stacks on and like what I hear more than anything. The less sound of the air flow had made a difference in being able to hear my stereo now. I'm not sure if it's the even flow or what but my girlfriend even noticed the difference. Of course it's still loud from the open exhaust but quieter from the front. Haven't GPS the speed to check if there's any difference there yet.