AC Mk IV 302 to 427 FE:Headers are in!

[AC Ventura]

AC Mk IV 302 to 427 FE downgrade 😜
Finally, the all stainless headers, 24" mufflers and undercar exhaust system are complete. Thanks to meticulous planning, the original ground clearance has been maintained and there is ample room between the header and the footbox for air flow and heat shielding, despite 1 7/8" primaries, 2 1/2" system. In a RHD car, the motor offset reduces the drivers footwell width by a full 1", compared to LHD, so you need to get your comprises right. Simpson Race Exhausts, here in the UK made light work of the installation and I particularly like the elegant and compact, one bolt jointing system used. Thanks to this the headers can be removed in situ, without removing the steering. Hopefully first fire up, the weekend after this.

[xb-60]

Originally Posted by AC Ventura

....downgrade 😜 ....

I like it!

Nice car. Workmanship on the exhaust looks good.
Will you put a heatshield over the steering u-joint?

Cheers,
Glen

[Sawdust]

Looks real nice! Great job on the headers

[AC Ventura]

Originally Posted by xb-60

I like it!

Nice car. Workmanship on the exhaust looks good.
Will you put a heatshield over the steering u-joint?

Cheers,
Glen

Hadn’t thought of that. It’s the same UJ in a similar position as the 5.0 302 had. I’m going to ceramic coat the headers and see how hot it gets.

[xb-60]

Ceramic coating will make an appreciable difference. Anything you can do to make the steering U-joint's life easier is worth it!

Cheers,
Glen