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WALKER® EXHAUST SYSTEMS: Abbreviations
A.I.R.
Air Injection Reactor		 FED
Federal		 O.H.V.
Overhead Valve
ALT
Altitude		 F.I.
Fuel Injection		 PASS.
Passenger
AMC
American Motors Corporation		 FLNG.
Flange		 PKG.
Package
A.T.
Automatic Transmission		 F.W.D.
Front Wheel Drive		 P.T.O.
Power Take Off
AUTO
Automatic		 GMC
General Motors Corporation		 REG.
Regular
AUX.
Auxillary		 GSKT.
Gasket		 REQ.
Required
A.W.D.
All Wheel Drive		 G.V.W.
Gross Vehicle Weight		 R.H.
Right Hand
B.B.C.
Bumper to Back Cab		 H.D.
Heavy Duty		 R.W.D
Rear Wheel Drive
BBL
Barrel		 HI PERF.
High Performance		 S.C.
Supercharged
BRKT.
Bracket		 HNGR.
Hanger		 S.B.C.
School Bus Chassis
CALIF.
California		 H.O.
High Output		 S.D.
Super Duty
CARB.
Carburetor		 H.P.
Horse Power		 SED.
Sedan
cc
Cubic Centimeters		 HYD
Hydramatic		 SER.
Serial
C.C.
Commercial Chassis		 H5D
GM Heavy Duty Emissions		 S.M.P.I.
Sequential Multipoint Fuel Inject.
C.F.I.
Central Fuel Injection		 I.D.
Inside Diameter		 SOHC
Single Overhead Camshaft
C.I.D.
Cubic Inch Displacement		 INCL.
Including		 SPEC.
Special
CLMP.
Clamp		 INJ.
Injection		 S.P.I.
Single Point Injection
CNG
Compressed Natural Gas		 INSL.
Insulator		 S.T.
Super Turbine
C.O.E.
Cab Over Engine		 L.C.F.
Low Cab Forward		 STA. WAG.
Station Wagon
COMM. CH.
Commercial Chassis		 LIMO.
Limousine		 STD.
Standard
CONV.
Converter		 L.H.
Left Hand		 STRP.
Strap
CPE.
Coupe		 MAN.
Manual		 SUB.
Suburban
CU. IN.
Cubic Inch		 MAN. TRAN.
Manual Transmission		 T.B.I.
Throttle Body Injection
CYL.
Cylinder		 MFI
Multiport Fuel Injection		 T.P.I.
Tuned Port Injection
DIA.
Diameter		 M.H.C.
Motor Home Chassis		 TRANS.
Transmission
DOHC
Dual Overhead Camshaft		 M.T.
Manual Transmission		 TURBO
Turbocharger
DR.
Door		 N.A.
Not Available		 w/
With
E.F.E.
Early Fuel Evaporation		 N.F.
Not Furnished - Reuse Old Flange		 w/o
Without
EFI
Electronic Fuel Injection		 NO.
Number		 WAG.
Wagon
E.G.R.
Exhaust Gas Recirculation		 N.R.
Not Required		 W.B.
Wheel Base
ENG.
Engine		 N.R.A.
Noise Restricted Areas		 W.D.
Wheel Drive
EXC.
Except		 O.D.
Outside Diameter
EXH.
Exhaust		 OE
Original Equipment