top speed header

**snYpz** · 28-09-2008 12:04 PM

Yeh i think you would need the headers on. I think they might need to adjust the length of the flex pipe in order for the length to be consistent to stock i would assume.

But anyhow, I will let you guys know if i can find out when i get mine installed.

**aaronng** · 28-09-2008 12:41 PM

Looks like it'll have to wait til next sat then.

**snYpz** · 30-09-2008 05:37 PM

Originally Posted by Suntzu

Can anyone who gets one of these Top Speed units next ( make sure you dont get the OBX one its difference and crap) measure the diameter of the final single pipe. The one that goes into the cat. I want to check it against stock. I think its 2 inch.

Just measured the topspeed out pipe and it is indeed 2 inch.

**Suntzu** · 30-09-2008 07:42 PM

It really begs the question of why upgrade the cat back from the stock 57mm pipes to anything bigger doesn't it...

**aaronng** · 30-09-2008 07:55 PM

Originally Posted by Suntzu

It really begs the question of why upgrade the cat back from the stock 57mm pipes to anything bigger doesn't it...

For the sound. And there is still resistance in the resonator and mufflers, plus that splitter section which looks like it is squished a bit before the split.

**Suntzu** · 30-09-2008 07:58 PM

Yeah. Id like a bit of a note to the exhaust! probably worth if after a few mods also with a bit of extra air flow eh?

**acura_ek1** · 30-09-2008 08:01 PM

Are the J's racing headers straight bolt on?
and how are they compared to Toda?

**Crapdaz** · 30-09-2008 11:18 PM

think both toda/j's racing and 5zigen headers needs to have cat made to suit.

**acura_ek1** · 01-10-2008 04:22 AM

Originally Posted by Crapdaz

think both toda/j's racing and 5zigen headers needs to have cat made to suit.

thanks man...would j's racing make similar power to toda?

**Crapdaz** · 01-10-2008 07:19 AM

yeh part of the top range quality stuff.

don't know too much but i reckon on par headers would be maximworks/toda/j's racing/5zigen.<--- as these brands of headers were designed for track

**aaronng** · 02-10-2008 12:38 PM

Originally Posted by acura_ek1

Are the J's racing headers straight bolt on?
and how are they compared to Toda?

J's racing headers have no flange to bolt up to the cat. So you will have to weld on a flange. Also, it does not have a pre-cat O2 sensor port, so you will have to have one done up either in the header (which I don't think is a good idea) or on the aftermarket cat side.

So all JDM racing headers for the EuroR need to have shorter cats, because the headers were designed for the CL7 K20A.