are there any mods or up grades I could do my stock intake for better performance? If so, how did ya do it? I heard that some people play around with the plenum what do you think?

take it off and get a Edelbrock RPM and nice Holly 650 with some Headers and you will feel the difference. Later add a nice Cam and boy you are good to go.

here is my SBC:

Mods: gasket match the ports.

Upgrade: Weiand Action+ or GMPP ZZ4-type. Performer is a lateral move.

Holley? Only if you enjoy spending money that leads to spending more money that results in emissions test/inspection failure but doesn't result in a performance improvement.

Okay Zora.

Too bad those don't look anything like Camel hump heads.
And since when is a Holley 670 made up of three single barrel carbs?

five7kid....what you mean by " the performer is a leteral move?" please explain, cuase if i can get a better emissions legal manifold then my performer,, im all for it.

He means that Performers are basically a stock replacment..no gain whatsoever. and he's right.


There is no such thing as going too big when it comes to dual planes. Go for a Steath, Brodix HVH, or even an RPM.


nice pic. I not only love how it matches your description, how realistic it looks, but appreciate the direct bearing it has to this post.

any of them have EGR?

The Performer and Action+ are available in EGR versions. The GMPP piece is EGR.

and out of them 3, what is the best? if ill get more power out of the action+, or the gmpp.... i want to know!! gotta keep up with my rice burner friends

I only know people who have been disappointed with Performers, I haven't had one myself or compared it side-by-side to the Weiand or GMPP. Edelbrock says idle-5500 RPM for the Performer, Weiand says idle-6000 for Action+.

I know my engine continues to pull to 6300 RPMs (although not as hard as before 6000) with the GMPP. The ZZ4 is rated at 355 HP @ 5250 RPM with that manifold unmodified, and you know it will rev above the peak HP. If you need more flow than a ZZ4 does, gasket match it.

If you're buying new, get the Action+. If you can find a take-off, get the GMPP. If it's free, go for the Performer, use the savings to join Weight Watchers.

All of this assumes you're talking EGR & q-jet (i.e., emissions). If you don't have emissions concerns and are willing to go aftermarket carb, get the Stealth & a Demon.

not trying to be a little punk and nag people, but whould the zz4, or the action plus be better for my modded 350? check sig for mods. i was thinkin bout fiding the zz4, and them gasket matching the ports..