SU stub stacks and K&N filters

[mperdue]

Anyone know if stub stacks (AKA velocity stacks) are worth the extra money when using aftermarket filters such as K&N? I think they're around $30 each. Supposedly they make the air flow into the carb smoother and more uniform, but I'm wondering if they're really worth the money. Thanks -

michael

[Bambikiller240]

All the info I have heard is that they are "worth it" on SU carbs, no matter what air filter is being used. That's why the stock Z has them built into the OEM filter housing. At one time the Z Therapy website had a write up on this subject. I don't know if it's still there.

[240ZX]

I concure with Carl. The only bummer is that you hide those beautiful aluminum velocity stacks under the K&N filters. These stacks do smooth out and increase the velocity of the air coming into the carbs. Also, changing the length of the stacks will move your performance power band a little......longer stacks, better low end....shorter stacks, better high end.

[Curtis240Z]

Yes, velocity stacks are functional they aren't there just for looks. If you don't want to spend the money just cutout the stock ones from the original backing plate.

[e_racer1999]

very functional..... i have that exact same setup in mine..... excellent performance...

[mperdue]

Thanks for all the advice guys. I'll go for the stacks.

Michael

[e_racer1999]

the set-up is a "sound" investment...