¼ = Quarter Mile in Drag Racing
1LE = Suspension Package Option
2WD = 2 wheel drive vehicle
4L60E = A4 Automatic Transmission
4L65E = Medium duty A4 Transmissions found in trucks
4L80E = Heavy Duty A4 Transmissions found in trucks
4WD = Four wheel drive vehicle
700R4 = Older generation 4 speed automatic
A3 = 3 speed automatic transmission
A4 = 4 speed automatic transmission
A/F = Air fuel ratio
AIR = Air Injection Recirculation system
AFPR = Adjustable fuel pressure regulator
APHB = Adjustable Pan Hard Bar
ASAP = As soon as possible
ASR - Automatic Slip Regulation (also ACSR)
ATF = Automatic Transmission Fluid
ATI = Supercharger Brand
AWD = All Wheel Drive
B/S = Back spacing, or Bull S---
B4C = Police Package Option
BBC = Big Block Chevy
BBDC = Before Bottom Dead Center
BDC = Bottom Dead Center
BFGDR = BF Goodrich Drag Radial
BGC = Blue-Green Chameleon
BHP = Brake Horse Power
BOV = Blow Off Valve (Used on some turbo applications)
B/O = Bolt on modifications to car
BSM = Body Side Moulding
BTDC = Before Top Dead Center
C5 = Fifth Generation Corvette (1997-2004)
CAGS = Computer Assisted Gear Selection
CAI = Cold Air Induction
CATS = Catalytic convertors
CCCI = Computer control coil ignition (IE: coil pack, ignition module)
CCLB = Crew Cab Long Bed Truck
CETA = Collector Edition TA (Yellow 2002)
CKP = Crank position sensor
CME = Center Mounted Exhaust (SLP)
Conv = Convertible model car
CMP = Cam position sensor
D/P = Down pipe
D/S = Drivers side (usually referring to the header)
DEG = Degrees (Timing or temperature)
DOT = Department of Transportation (usually regarding street legal sticky tires)
DR = Drag Radial tires
DRL = Daytime Running Lights
DSL = Driveshaft Safety Loop
DTC = Diagnostic Trouble Code
E/T = Estimated time
ECL = Exhaust Lobe Center Line (Canshaft)
ECM = Electronic Control Module (computer)
ECSB = Extended Cab short bed truck
ECT = Engine Coolant temperature
EGR = Exhaust Gas Re-circulation
EGT = Exhaust Gas Temperature
ET = Elapsed Time
FBODY = Chassis designation for Camaro and Firebird
FI = Forced Induction (Supercharger or turbo)
FIPK  = Fuel Injection Performance Kit  (K&N product)
FLP  = Finish Line Performance Long tube Headers
FMU = Fuel Management Unit
FP = Fuel pump
FPSS = Fuel Pressure Safety Switch
FRP = Fuel Pressure Regulator
FRA = Free Ram Air
FRC = Fixed Roof Coupe Z06 with the standard LS1 engine instead of the LS6 engine...Only offered in 99 and 00
F
TRA = Fast Toys Ram Air
FWD = Front Wheel Drive
FWIW = For what it's worth
FYI = For your Information
GMHTP = (GM High-Tech Performance)
GPH = Gallons per hour
GPS = Grams per second
HP = Horsepower
HPIII (3) = Hypertech Power Programmer # 3 (HPPP)
I/C = Intercooler
IAC = Idle Air control valve/motor
IAT = Inlet Air Temperature sensor
IC = Ignition Control circuit
ICL = Intake Lobe Center Line (camshaft marker)
IGN = Ignition
INCON – Manufacturer of Twin Turbos for LS1
IRS = Independent Rear Suspension
KBDDSFC = Kenny Brown Double Diamond SFC
KR = Knock retard
L/H = left hand side (IE: air bags)
LQ4 = Iron Block – LS1 based truck engine 6.0 Liter
LS1 = Gen 3 small block V8, 1997
LS2 = Gen 4 small block V8, 2005
LS6 = Gen 3 small block V8 Corvette, 2001
LCA = Lower Control Arm
LOL = Laughing Out Loud
LPH = Liters per hour
LSA = Lobe separation Angle (Camshaft)
LTs = Long Tube Headers
LTFT = Long Term Fuel Trims (Tuning related)
L
TRIM = same as LTFT
M6 = Manual 6 Speed
M/T = Mickey Thompson
MAF = Mass Air Flow
MAF = Mass air flow sensor (on Scanmaster, it's read in Grams per second)
MAFT = Mass Air Flow Translator
MAP = Manifold absolute pressure sensor (amount of boost or vacuum that's going into the motor)
MAT = Mass air Temp sensor (under hood temp, or temp of air entering motor)
MM&FF=Muscle Mustangs and Fast Fords (or something like that)
MN6 = Manual 6 Speed
N20 = Nitrous Oxide
NA = Normally Aspirated (Not Forced Induction, as in Turbo or Supercharger)
NBM = Navy Blue Metallic
NOS = Nitrous Oxide
O2 = Oxygen sensor
O2#'s = Oxygen sensor #'s in Mv
OEM = Original Equipment Manufacturer (stock)
ORP = Off Road Pipe
ORYP = Off Road Y Pipe
PCM = Powertrain Control Module (Engine and transmission)
PCV = Positive Crankcase Ventilation
PE = Power Enrichment (WOT wide open throttle settings)
PHB = Pan Hard Bar
PITA = Pain in the A$$
POS = Piece Of $hit. usually in same sentence describing LS1 clutch
PPM = Pounds per minute
PSI = Pounds per square inch (IE: Boost)
PW = Pulse width
QM = Quarter Mile
R/H =Right hand side (IE: air bags)
R/T = Reaction time
RCSB = Regular Cab Short bed Truck
RCLB = Regular Cab Long bed truck
RPM = Revolutions Per Minute (Engine Speed)
RWD = Rear Wheel Drive
RWHP = Rear Wheel Horsepower
RWTQ = Rear Wheel Torque
SBC = Small block chevy
SC = Super charger
SES = Service Engine Soon
SFC = Sub frame Connector
SOTP = Seat of the Pants
SOM = Sunset Orange Metallic
Static FP = Fuel pressure reading with car running, vacuum line off.
SS = Super Sport
SSLE = Super Sport Limited Edition 2002 Anniversary Option
STB = Shock/strut Tower Brace
STFT = Short Term Fuel Trims (tuning related)
S
TRIM = STFT
T56 = Part Name for M6 transmission
TA = Trans Am
T/B = Throttle body
T/H = Terry Houston
TB = Throttle Body
TBody = Throttle Body
TBrake = Transmission Brake
TC = Torque Converter
TCS = Traction Control System (TA)
TDC = Top Dead Center
TFP = Transmission Fluid Pressure (Valve or switch)
TH350 = Turbo Hydromatic 3 speed automatic transmission
TH400 = Heavy duty Hydromatic 3 speed auto
TP = Throttle Position
TPS = Throttle Position sensor, (4.70 @ WOT)
TQ = Torque
TT = Test & Tune (night at track)
TT = Twin turbos(Incon)
T-TOP = T-top roof option
TTT = To The Top
UCA = Upper Control Arm, part of front suspension
VATS = Vehicle Antitheft System (Coded chip in ignition key)
Vert = Convertible
VSS = Vehicle Speed Sensor
WBO2 = Wide band O2 sensor
WG = Waste Gate (Used on some turbo applications)
WOT = Wide Open Throttle
WS6 = Firebird Performance Package (RPO code)
WU8 = Camaro Performance SS Package (RPO code)
Y2Y = Exhaust upgrade option for SS Camaro (Dual dual system)
YBody = GM Corvette Chassis
Z06 = Corvette Performance Package Hardtop (RPO Code)
Z28 = Camaro V8 (RPO Code)
ZL1 = Camaro Modified by GMMG with LS6 or 427CID engine