will i gain power if i install these i have stock exhaust?? will it be louder and about emissions for people that say that crap we dont have that here where i live. so what the advantages/disadvantages of installing test pipes. any info would be greatly appreciated

 

Honestly, it'll probably sound horrible with the stock exhaust. If you even gain any power from it, it will be minimal. Would suggest you get a cat-back system first, then do test pipes after that.

 

i want a hks system does anybody know where one is for under 800

 

My friend has a Z with test pipes and stock exhaust and it sounds really nice. he said he feels a gain after 4K RPMs

 

yeah i was gonna buy them from a guy off my350z he said after 2500rpms is when u really feel it but i dont want it sound like s*** but every hks system for sale on here they wont ship it. damn thats what they make boxes for