4-2-1 headers, what brand is good at reasonable price??

**locote** · 19-08-2005 06:36 PM

http://www.tprmag.com/issue/10/10_b16_headers.shtml

HyTech Exhaust - TEST SET 01
At this point, you've already seen the graph on the previous page, and you've probably already done the math. Yes - we're showing a 51.1hp increase. Yes, that's highly unlikely and it made everyone... uncomfortable. We have to note that the HyTech unit is marketed as a "racing" header and will not fit with the power steering and air conditioning compressor intact; these were removed for our testing of the header. Still, our test procedure stayed the same, our test platform stayed the same, and the multiple runs we did were all repeatable to within 3 horsepower of each other, with power curves following the same lines each time. Like the other headers, the HyTech unit increased low-end torque production to such a point as to negate the effects of the "pre-VTEC" dip in the powerband, and it also straightened the graph to make the powerband more linear after that point. Like the other headers, the standard test procedure was followed, with the same extension pipe mounted onto the header. DISCLOSURE: The pipe was provided to us by HyTech as they were concerned about the possibility of a loss of power due to the relatively short runner length from the collector to the header's exhaust gas exit point. Now, one could easily conjecture that the pipe benefited HyTech the most because they designed it, and that would be true. However, that fact doesn't prove that this was an act of collusion; it rather suggests that HyTech might know a little something about header design that we don't know - hence, their polite suggestion that we use the pipe on all the header tests. Given the design of the pipe (essentially a long test pipe or straightpipe) and the fact that the tests were conducted pragmatically and without bias, we wondered if it might be possible that the header wouldn't make as much power if attached to a complete exhaust system. When we brought all of this information and the dyno charts to our peers and a few industry tuners, however, they all had different opinions...

**ginganggooly** · 20-08-2005 08:42 AM

Originally Posted by luzinit

how much are those headers bro?

you are looking at around 1k over here i believe...

**ONV73C** · 20-08-2005 09:02 AM

Originally Posted by locote

http://www.tprmag.com/issue/10/10_b16_headers.shtml

Just read the article...

pretty phenomenal increase for the b16a!

**locote** · 20-08-2005 10:26 AM

they didnt run a full exhaust but.
but for the track thats awsome power to have a out of a N/A 1.6

**locote** · 20-08-2005 10:27 AM

i havent being able to find any test figures for the edelbrock header, any 1 found anything to prove their claim if 9 kw gain???

**Lukezen27** · 20-08-2005 04:29 PM

Originally Posted by locote

i havent being able to find any test figures for the edelbrock header, any 1 found anything to prove their claim if 9 kw gain???

9 kw gain??? holy cow

lets see some prof

**typsy** · 21-08-2005 09:35 PM

Yeh sure the Hytech header gives the best gains, but its not practical for raod use. Its a race header and the power steering and the air conditioning has to be removed to install one of these. It also cancels out the cat. You will seriuosly get fukd over by the cops if they see one of these babies under your bonnet.

**91OOM** · 22-08-2005 05:48 AM

cops probebly wouldn't know what it is, let alone think that the cat is taken out.

**spardikis** · 22-08-2005 12:29 PM

ahh the NZ boy's will remember the good Old DAys of no cat....

**gnx1987** · 22-08-2005 09:38 PM

I got some hitechs (just press bent and mild steel though) for 220. No idea what the power gain (or loss) was but it gives a nice sounding crackle in the note between 2 and a half and 3 and a half and the vtec band sounds sweeter as well.

**z3lda** · 22-08-2005 11:50 PM

hitech is different to hytech.

and no way would hytech header sell for 220. they cost 1k+

Originally Posted by typsy

Yeh sure the Hytech header gives the best gains, but its not practical for raod use. Its a race header and the power steering and the air conditioning has to be removed to install one of these. It also cancels out the cat. You will seriuosly get fukd over by the cops if they see one of these babies under your bonnet.

you can get normal street use one.

The header are longer then the usual one but IT does not cancel out the cat, you'll just need to relocate it furthar down the car with custom piping.