I have cat back true duals. Thinking a plenum spacer is next... if that's what you all recommend (i see you guys normally do recommend it). what about after that? or next if you don't think i should get a plenum spacer

SIDE NOTE- The molding below my driver side door (03 coupe) is broken towards the back of the strip. any idea where I can get a replacement/what the cost is? thanks

 

yup you should definitely get the MD plenum spacer and a CAI

 

high flow cats berks...

 

high flow cats...eh? would it be worth it for the power to just go with test pipes? I just got emissions done so I'm good for a minute on that, plus I can swap out on a lift any time I want. What's the bonus of HFC's vs test pipes (other than emissions)?

 

^test pipes are louder and less restrictive, but you will most likely get a raspy sound.
A Z-tube and drop in filter is better then a CAI.

 

5/16" spacer and ART pipes.

 

ART? and what are gains of drop in K&N + z tube?

 

test pipes stink also and sound raspy high flow cats dont and you can pass emissions with them. but feel comfortable with whichever.

 

what are the gains of the hi flows vs the test pipes?

 

https://g35driver.com/forums/intake-...art-pipes.html
https://g35driver.com/forums/intake-...s-results.html

 

Test pipes will make your exhaust sound terrible and you'll be illegal and easy to spot with your stinky exhaust....cops love em!

Not all CAIs are equal and none of them really offer in HP gains regardless of what the manufactures claim with our Infinities. CAIs like Stillens Z-Tube combo along with MotorDynes 5/16" spacer with give your great results. Then all you need is BERK'S HFCs to complete the mods. Once that is done you'll need is a Osiris tune which will result in a very fun kick azz ride....
Gary

 

[QUOTE=gary c;5967505]Test pipes will make your exhaust sound terrible and you'll be illegal and easy to spot with your stinky exhaust....cops love em!


i agree

 

ah oh welll may go with HFC's then. but they're a bit expensive... I guess I'll go with K&N drop in, z tube, and a 5/16 MD for my next couple mods? Anyone know gains from Berk HFC's?
oh and, "osiris tune"? most people I know who tune their cars it's because they built the engine or went FI or something, isn't a tune pricey for just doing some simple mods? plus it would really make me never want to mod it again, fearing needing another tune

 

they claim 10-13 but i would say maybe 8...i have done a dyno on mines but u can definately feel the push around 3k

 

A tune is pricey, especially when done the right way on a dyno. And you don't have to be FI to get a tune, although it is more fun that way . Once you have the basic bolt-ons that have been listed it is recommended to get a tune since your A/F will most likely be off and you gain performance from it.