idiot-stick

Ok, this is gonna be a retarded question:

I bought an HF manifold w/adapter plate and turbo. So Friday I removed my stock exhaust (d15b1 in 88 hatch), and realized it looked exactly like an 'HF' manifold. Are they the same thing?

I'll want to sell my stock manifold, but wouldnt want to label it as an 'HF' manifold and be wrong somehow and waste somebody's time.

Thanks in advance

nonvtec

hf, std, cx, vx... all the same

turbohf

yeah it has become known as a "HF manifold" same thing....there use to be a writeup on it in the tech section...

idiot-stick

Thanks for the info. Now could somebody tell me what STD stands for?

iflybye

Sexually Transmitted Disease
Wear a condom on the mani

turbohf

you gotta be carefull these days.....



oh its short for standard....

ibassez

hf std cx and vx something with the precat setup

Racintweek

my 91 STD didnt ahev the " HF " mani, but it didnt look like the Si one either

davcivic

yes, the earlier std hatches had the HF manifold, their is slight differences on the runners and the way it looks, but so slight that can't hardly be seen.

There was a tech article about them a long time ago. The STD I think had a number 3 on the first runner, the hf has something different. I think the STD had the larger runners, not to sure about it.

91civicZ6

only 88 STD has the "HF" manifold, and yes it has the #3 printed on a runner. the plenum is physically bigger and it appears that the runners are just a tiny bit bigger, but the ports look the same. so in essence, the STD manifold can be ported larger.