I already have the Z tube but what else can i throw in there to add a bit of HP
I looked up the plenum 5/16¨`motordyne gasket but is it worth it and which one should i get?

 

Well to start off the 5/16 Plenum modification is a SPACER not a GASKET. theres a big difference there. Even though I dont have one, these spacers are the best bang for buck modification around. Motordyne claims around 12-14WHP (is that right?) power boost.

These VQs dont really take small bolt on mods very well so if you want big power you need to go Forced Induction (turbo, supercharger).

 

Best bang for the buck NA mod is by far the Plenum Spacer, We offer an angled spacer which helps even out the volume of the stock plenum.

You can find more info HERE

Next i would recommend Test Pipes and/or a Cat back exhaust.

Heres some info on our Z1 Test pipes

And as far as bang for the buck its hard the beat the APS 2.5" exhaust, it sounds awesome and makes great power. I ran it on my personal car NA (270rwhp) and FI (585rwhp)

Here is more info on the APS Exhaust

Other great options for exhaust are Stillen and HKS. Mods all really just depend on how much your willing to spend and what the car will be used for.

-Rob

 

How tall is the Z1 spacer? Are the test pipes resonated or non-resonated? Just curious I didn't see this info on your site.

 

Our spacer angles from 1/2" to 1/4"

Our test pipes are non-resonated. We also just released HFCs for 370's and HRs, from my understanding DE HFCs are in the works.

 

I would have to say if you want the most power with just bolt ons its better to go with a single exhaust instead of a dual lighter and the momentum system sounds sik (if you don't care about how your rear looks like. Spacer is another cheap but great bolt on. However, after all those you would need a tune to get all those working properly together. For me the best bang for the buck so far has been my test pipes I don't have a spacer yet.

 

Just realize if you go tp you start getting into a raspy note with the exhaust unless you find a combination that prevents it. Resonated will help but will still sputter a bit (rasp)... Even HFCs if not ceramic coated like Berks can be a bit raspy. Plus the smell is a bit more offensive with tps.

With that being said as you start moving into the performance parts you start losing se creature comforts. There are combos out there that are 0 rasp- but take the time to find them.