Table 1, Weight of Original Equipment vs Replacement Parts: 1973 Porsche 911S (All weights are in US pounds)

Research and compilation by Jim Calzia

Abbreviations: Front, Rear, Left, Right, FiberGlass, Original Equipment

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Body

Original Equipment
Factory weight

Revised weight

Replacement Equipment

Steel hood w/o latch, receiver and release cable
35

16

AIR FG hood (street weight)

Hood latch, receiver and release cable
1

-

-

Steel door w/spring return, handle and lock
29

9

AIR FG 911R door w/hinge

Door handle and lock
2

-

-

LF steel fender w/full paint and underseal
21

7

F GT Racing FG 9" ST/RSR fender

RF steel fender w/o underseal
19

-

-

F steel 'S' bumper
23

8 (min)

AIR RS F spoiler w/oil cooler cut out (destroyed in 5/97 crash)

-
-

11

AIR IROC F spoiler for 9" flares

R 3-piece steel bumper w/large rubber bumperettes
25

6

AIR RS R bumber for 8" flares

-
-

11

AIR RS R bumper for 8" flares (w/insulation pads)

-
-

7

AIR RSR R bumper for 11" flares

Steel engine lid w/o PORSCHE or grill
11-12

13

Factory ducktail spoiler

-
-

19

AIR improved IROC spoiler

16 gal gas tank w/sender and low fuel lite
30-31

30

ATL 15-gal fuel cell w/sender and low fuel lite

11 qt oil tank w/ fittings and hardware (dry)
11

7

SmartProducts 14-qt oil tank w/o fittings (dry)

-
-

3

Custom F-R wire harness

Interior

Original Equipment
Factory weight

Revised weight

Replacement Equipment

911S vinyl sport seat
31

15

OMP FG race seat

-
-

22

Kirky Speedway deluxe race seat

Adjustable and tilting seat mount
22-23

4.25

Custom mount for OMP seat

-
-

6

Custom mount for Kirky seat

All upholstery (2x door panels, 2x door pockets/side,
2x door arm rests, 2x upper door trim; rear panel,
2x R side panels, 2x shoulder-lap belts and retractors,
2x R seat cushions, 2x folding seat backs, 2x R window trim
56

1

RS-style door panel and pull

Sunroof, motor, gear drive, cables, tubes, hardware
20

4

TRE FG sunroof

False ceiling in cabin for sunroof
11

-

-

Windows

Windshield w/rear-view mirror
21

9

Mukilteo 3/16" Lexan flush mount assembly

Windshield w/o rear-view mirror

20

-

-

R side vent w/o seal
1

0.5

Mukilteo 1/8" Lexan MR

Door window w/roll-up mech
11

-

-

Door window w/o roll-up mechanism
7

2

Mukilteo 1/8" Lexan MR

Quarter window w/frame and seal
4

<1

Mukilteo 911R qtr. window w/open rear-facing louvers and drip pan

Heated rear window w/wiring harness
17

5

Spektr 1/8" Implex flush mount assembly

Electrical

Original Equipment
Factory weight

Revised weight

Replacement Equipment

2x head light assemblies, 2xtrim rings and 2x turn signals;
2x tail light assemblies
19

10

2x FG covers for headlights; R tail light mounts; F and R lenses

911 wiper motor and transfer assembly
9-10

2-3

944 rear window wiper motor

Wiring harness, fuse boxes, relays, etc
36

3

F to R main cable

Diehard 31451 battery
28

-

-

Underseal

Cabin floor and L&R F fenders

15

-

-

Trunk, engine bay and all wheel wells
14

-

-

Bottom of car (F to R)

9

-

-

Abbreviations: Front, Rear, Left, Right, FiberGlass, Original Equipment

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