So does any company make a set of headers for the VFII that will bolt on with no modifications using existing cats yet ???
HM used to but can’t confirm because website is down
Between $500 and $1000 gets you ready-made shorty 4-1
for all Zeta.
There is no difference in dimensions or flange type for factory LS2, LS3, L98, L76, L77 or L99 headers BTW. So doesn’t matter what cat, everything cat forward is going to be the same. So this is not a VF question.
Also this is not really relevant to HSV extractors, new thread would make sense.
99% of members don’t mind helping out, it’s the structure of this forum being sub-segmented into micro partitions for the same platform that’s the problem. It means you can’t access who’s been there done that unless you know the jargon and do a forum search on every keyword.
Anyway, the two off-the-shelf options are JBA 1813S
And BBK 4020
Both come with chrome, silver ceramic or titanium finish ceramic coat options and are emissions compliant.
Yes better because more HP at high RPM and possibly better sound, at the expense of low RPM linear power. The old saying goes, “people buy horsepower, but drive torque.” You’re using primarily torque racing someone from stoplight to stoplight or passing on the highway. You’re using horsepower when you’re keeping the engine near redline going around a racetrack.
Specifically the stock cats will choke well before you reach the power (at high RPM and flow) these are designed to deliver.
So you lose down low and don’t gain what you expect up top without tuning secondary pipe and cat.
See my thread on
choking cats. Also conjecture in this regard on the Camaro forums for use of shorties same reason.
