TO MIKE NEGUS and others.

[KHummel66]

I agree with NLR = Noise Level Reduction. Some cars have an insulator attached to the underside of the hood, some don't. Some cars have insulation attached to the tops of the plastic front inner fender liners, some don't. Etc., etc., etc. The build instructions for that stuff had to be somewhere as each car made it's way down the line.

[foxchassis]

OK, then what did cars with "NLR" get above and beyond the standard noise reduction packages?......

Capri

The '79 and '80 'Interior Accent Group' opton included a "deluxe" sound package, among other items. It was a standard feature in the Ghia and was described as an "improved sound absorption package" and an "upgraded sound package" in the '80 brochure. It was optional all other models in '79 and '80. No indication what was in this "package" or if there were any additions or deletions allowed.

All '81 models got a "deluxe" sound package as a standard functional feature. No indication what was in this "package" or if there were any additions or deletions allowed.

All '82 models except the base got a "deluxe" sound package/"improved" sound deadening material as a standard functional feature. No indication what was in this "package" or what this "material" consisted of, or if there were any additions or deletions allowed.

All '83 models except the base got "improved" sound deadening material/"upgraded" sound insulation package as a standard functional feature. No indication what this "material" consisted of or what was in this "package", or if there were any additions or deletions allowed.

All '84 through '86 models got a "luxury" sound package/insulation as a standard functional feature. No indication what was in this "package" consisted of, if there were any additions or deletions allowed.

Mustang

The '79 through '81 'Interior Accent Group' option included "extra" sound deadening materials also known as a "deluxe" sound package, among other items. It was a standard feature on the Ghia 2- and 3-door sedans and optional in the base 2- and 3-door sedans. The specs of the "basic" body insulation (standard on the base models) and the "deluxe" sound package can be seen HERE ('79), HERE ('80), and HERE ('81). No indication if there were any additions or deletions allowed.

The '82 GL and GT models got a "deluxe" sound insulation package and the GLX model got a "luxury" sound insulation package as a standard functional feature. No indication if the L model got even a "basic" body insulation package that the earlier years did, or what the deluxe or luxury "packages" consisted of, or if there were any additions or deletions allowed.

All '83 models except the L got a "deluxe" sound insulation package as a standard functional feature. No indication if the L model got even a "basic" body insulation package, or what the deluxe "package" consisted of, or if there were any additions or deletions allowed.

The '84 L model got a "deluxe" sound insulation package as a standard functional feature. All other models got a "luxury" sound insulation package as a standard functional feature. No indication what the these "packages" consisted of, or if there were any additions or deletions allowed.

All '85 and '86 models got a "deluxe" sound insulation package as a standard functional feature. No indication what this "package" consisted of, or if there were any additions or deletions allowed.

[foxchassis]

I don't remember if I mentioned this before but "NLR" is only on '82-'86 model year tags.