HM headers

[TWaGn]

I can't help as far as HM headers, but I am just wondering of your impressions of the 6g75 conversion?

Ive driven a wagon with a 75 which i then pulled out to put into mine, its nothing spectacular but it does run alot better than the 74. More responsive and of course more power

[Mantz_Machine]

Hi Mantz_Machine,

I've heard mixed reactions about the Pacemaker headers and if my memory serves me they need a customised Y pipe and hang lower which could be a problem for lowered vehicles? But search the forums for members comments. Wildcat make some to and they look very similar to the Pacemakers. It's a real shame about the HM Headers, as they had the mounting plates for the factory heat shields. RPW well there is a lot of mixed feelings about them on this forum but their race design headers look similar in design to the HM Headers.

lI don't wish to stray off topic, but I have been contemplating a 6G75 conversion for my AWD VRX. Who did your conversion here in SA?

What is stalling me is the fact that here in good ol SA I am required to put the car over the pits at Regency for a mere 300cc increase in capacity for rego.

I had mine done at Mitsi-Bits at Lonsdale, I asked them about the conversion when I had my car serviced there a while back. They said it was a popular mod and they'd done a fair few. They also supplied the 6g75 which was nice.

[6g75 Verada]

Can anyone advise of any legality problems following their conversion?

From what I understand, and please correct me if I am wrong, is the term "Regency" (S.Aust only)just referring to a thorough roadworthiness check carried out by authorised mechanical inspection stations and does not involve an emissions test?

N.S.W. term = "Blue Slip" - with the major emphasis being on VIN/Engine number verification.

I am only concerned about state government registration issues, not comprehensive insurance issues.

In NSW, as you state, you need to get a "Blue Slip" for change of details. It's purely to update engine # and isn't a complete "Blue Slip" inspection.

[whiteawd]

As I stated in NSW if you're not at the wild end of mods, you won't mind being full blue slipped, as this is safety focused, not in an outrageous way. My plan B NSW blueslip, for 380 into AWD, if I can't rego in ACT, but I'd be surprised. However much happens to keep me humble.

If Misibits at Lonsdale Adelaide have done a lot of swaps I doubt it's a big deal even at Regency.

[macropod]

For an idea of the difference a set of HM headers makes (if you can find them), see my dyno report at: https://www.aussiemagna.com/forums/sh...=1#post1596077. Although the comparison was done on a 3.5 motor, the % difference on a 3.8 motor would be about the same. As for fitting, it's quite straightforward - basically disconnect all exhaust components forward of the catalytic converter, then fit the headers in their place.

[Madmagna]

There is a huge difference on the AWD going from standard front exhaust to headers as the AWD is very restrictive in the lower pipe. When I say huge you will not light up all 4 wheels however the flow is so much better

Only issue, HM are no longer made, I was a HM dealer and got the last couple of sets they had and they were sold long ago

As for the 6G75, I did one of the very first conversions way back when, have done over 400 since in to all sorts of Mits including Pajero's, Challengers, Tritons, Magna's and Verada's The change is noticeable. The average stock AWD will get mid 90'skw if that makes sense, just the motor change alone will lift that upto high 120's, do exhaust, intake manifold and a tune and high 130's to low 140's is achievable. Remember basing these numbers on the stock 380 is pointless as the 380 is that bogged down with emissions, cats etc etc when you free these motors up it makes a difference

[macropod]

In case anyone is interested: https://www.aussiemagna.com/forums/sh...d.php?t=108083

[whiteawd]

My "pay Mal" AWD 380 conversion was inspected and registered with no issues in ACT today. 3.8 conversion was placed on NRMA paperwork for comprehensive insurance, prior to collection, open disclosure, no problems. So for ACT it seems easy.

[macropod]

FWIW, the my ex-VRX AWD is now listed for auction. See updated details in my previous post's link.