Eyeshield25

What's going on guys. I am in the market for shorty headers(Can't pass emission with Lth so please don't suggest). After numerous hours of researching, I have come to the conclusion that Z1 and Tomei V2 are the best available options for shorty headers other than your typical generic Stillen/DC/Ebay brands. With that said, which header is actually better? The Z1 has 1.75in primaries while the Tomei has 1.68in, they are both out of SS304, and they are both in the same price point $~900. IF you have one, or the other, or both installed, please comment below.

slartibartfast

iTrader: (7)

chuckie311

iTrader: (3)

here you go read through my thread i have the Z1 headers you do need to buy the DE HFC if you get them

https://www.myg37.com/forums/engine-...er-thread.html

baseline dyno 291whp and 233wtq
After install 307whp and 236wtq
16whp and 3 wtq gained after install
after tuning 309whp and 243wtq tuned

Eyeshield25

How are you liking them? I am deciding between the two headers to go with E85.

Awakence

Do you have to run DE test pipes or hfcs with the Tomei ones?

Eyeshield25

For both Z1 and Tomei, you have to run DE testpipes or hfc

projectpanda13

iTrader: (2)

I don't know which version Moncef has but he is running Tomei headers on his coupe. Maybe reach out to him and ask about his experience?
Latez

Eyeshield25

He has the V2, and he likes either or but didn't really point out which one specifically. After some more research and other references from people I am probably going for the Z1 just because it has bigger primaries and many people have gained well over 15-20whp with them.

Awakence

Might be a stupid question but if you run the Z1 or Tomei Headers and use DE testpipes, can you use the rest of the catback for vhr and can the Y pipe be for vhr as well?

Eyeshield25

Yes you can run DE testpipes with VHR Y-pipe and exhaust.

slartibartfast

iTrader: (7)

Eyeshield25

I am running Tomei Y-pipe and Tomei single exit exhaust as well so I'm not sure what you mean.

slartibartfast

iTrader: (7)

Awakence

referring to fitment wise for VQ37VHR but aftermarket y pipe.

Eyeshield25

Yes all I was referring to is that you can fit DE style headers and test pipes with VHR flange y-pipe and exhaust.