Re: Autolite double platinum plugs? Also indexing?
 

Are those 25mm (1") reach with a tapered seat and 5/8 (16mm) hex?
Those are the parameters I need

Re: Autolite double platinum plugs? Also indexing?
 

The specifications show the lengths as follows:

The Champion 470 is 25.5mm (1.00") long.
The Autolite AR3932X is 25mm (0.984) long.

The Autolite plug is also shown as a plug application for the late model Hemi engine.
It may not require adding the washers as you want to.

http://shop.advanceautoparts.com/wcs...x_pri_larg.jpg

http://i.ebayimg.com/18/!BucMrUQBmk~...nhJylg~~_3.JPG

Re: Autolite double platinum plugs? Also indexing?
 

The Autolite X plug shown is 3/4 reach gasket seat, They do make a .708 tapered seat X plug I have all of the X plugs in stock.
Rich

Re: Autolite double platinum plugs? Also indexing?
 

What's the story on the X plugs? Any performance gains? What is the target market?

Re: Autolite double platinum plugs? Also indexing?
 

Art,

It double checked and the above plug is incorrect.
The confusion stems from your statement for a plug for a 2000 PT Cruiser cylinder head. The PT Cruiser was launched in 2000 as a 2001 model.

So, for a 2000 Neon application, the spark plug is not tapered, it uses a gasket and the above racing plug will work.

You should look at the tapered plug that Rich (quickford1) has available.

Re: Autolite double platinum plugs? Also indexing?
 

To try to answer everybody at once I will try to explain the X plug. It was first used in Nascar because of ground straps burning off or breaking off, they are made by both Autolite& Champion in limited heat ranges and numbers .They are used by just about every team. They are available 708 tapered seat & 3/4 reach gasket seat. The best part is no need to index. These plugs are made in limited runs so are hard to get sometimes.
Rich

Re: Autolite double platinum plugs? Also indexing?
 

Got anything equal to an AR473? Indexing taper seat plugs is a pain! May save alot of aggrivation here. Joe

Re: Autolite double platinum plugs? Also indexing?
 

Joe
The hottest they make in a X plug is a AR471X-10 it is equal to a 472 or S57C champion.
Rich

Re: Autolite double platinum plugs? Also indexing?
 

I happen to run an AR 92 or AR 94. Looks similar in shape and design when it comes to the AR3922 plug other than the tapered seat.

Re: Autolite double platinum plugs? Also indexing?
 

The AR92&AR93 are a .708 reach tapered seat plug ,both are power tip plugs that are good for some HP if you have some piston to plug clearance. 92=472 & 93=473 I have plenty of both.
Rich