I have a worked A12 in one of my 120y coupe's.
I run a 32/36 weber and extractors that run into a 2 inch exhaust with a sports muffler.
It is quite loud but sounds great.
Anything bigger would be toooo loud I reckon.

Whats an exhaust?? [img align=left]http://datsun1200.com/modules/myalbum/photo.php?lid=8110&full=1[/img]

pasted the wrong url thing

I use black zinc coated Hi-Flow extractors 4 into 1 with 2inch lukey system with single muffler. Very loud and good flow

anyone running catalyct converters?

Why?? not needed on a car built before 1986 in australia.

as the cars before 1986 (?havent checked the date, i assume thats right) were before the australian design rule which enforced cats.

Pre 75 or 76 means even less rules. And i think pre 73 means bugger all ADR, i think basically all you need is working windscreen wipers and front seatbelts.

The weird thing is I've seen engineers make people put cats on their 1969 1600. I'd be asking where and why.... They are expensive items, if they arent needed :)

If you put in an engine thats later than a 1986 model than you need to comply with the appropriate standards (such as a cat).
They even made me put rear setbelts in my 1600 even though they didn't come out with them and aren't supposed to be needed for pre-1973

I'll have to reread the ADR rules, as far as i could tell it went on the build date of the chasis. I could be wrong.

either way, you cant argue with engineers. everyone knows they are always right..

B120DAT! They're nice looking headers. Can you give us a clue for the price you paid and where from!