Common Abbreviations

From 3.8Wiki

The following is a listing of typical abbreviations and phrases used in reference to Bolt-Ons

A/F

Air / Fuel Ratio

ASP

A maker of Underdrive pullies

BBK

A performance company

Butterfly Valve

The throttle body control plate

CAI

Cold Air Induction

CARB #

A serial number that proves compliance with the California Air Resources Board emission regulations.

CAT

Short for Catalytic Converter

CEL

Check Engine Light

Chip

Reference to the Computer chip that controls the operation of the vehicle.

Crossover

Any type of mid-pipe which connects the pipes coming from the cats.

DC

Densecharger (AKA Tunable induction)

Donut

Exhaust flange gasket

Drone

A low frequency sound that usually occurs at a specific RPM while the engine is under load

Dumps

An exhaust setup which does not include cats, mufflers, or any pipes after the headers

EGR

Exhaust Gas Recirculation

Exhaust Flange

A coupler used to connect exhaust system components; usually found on headers-to-midpipe and midpipe-to-catback connections

FIPK

Fuel Injection Performance Kit (Developed by K&N)

Flows

Usually short for Flowmasters

H

A type of exhaust crossover pipe in the shape of an "H"

H/C/I

Short for Heads, Cam and Induction

Harmonic Balancer

Connected to the crankcase to reduce torsional vibration. Seperate from 94-98 V6 crank pulley / integrated on 99-04 V6 crank pulley.

High-Flows

Usually meaning High Flow Catalytic Converters

IAC

Idle Air Control

IAT

Incoming Air Temperature sensor

ID

Inside Diameter

LT

Long Tube Headers

Lower

Lower induction manifold

MAC

A performance company

MAF

Mass Air Flow sensor

Mandrel Bend

A bend in which the diameter of the pipe stays the same throughout

MIL

Malfunction Indicator Lamp

O/D

Overdrive

O/R

Off-Road. Typically used in reference to Off Road Exhaust pieces which are not street-legal

OD

Outside Diameter

ODP

Overdrive Pulley

OEM

Original Equipment Manufacturer

P&P

Port and Polish

P/S

Power Steering

PCV

Positive Crankcase Ventilation

Permatex

A maker of various gasket maker materials/silicones.

Plenum

Another way to say intake

Pre-cats

The first pair of catalytic converters on stock mustangs

R/R

Roller Rocker

RAI

Ram air intake. Refers to a cold air intake that does not extend into the fenderwell.

S/S

Stainless Steel

Secondary cats

The second pair of Catalytic Converters on stock Mustangs

Shorties

Short tube headers

Single Port

Refers to 94-98 V6 Mustangs

Sniffer

Refers to Emissions testing

Snorkel

The stock air box silencer

Split Port

Refers to 99-04 V6 Mustangs

Take-offs

Stock exhaust taken off another car, usually a Mustang GT

TB

Throttle Body

Turn-downs

Exhaust piping turned downward directly after mufflers with no tailpipes

UDP

Underdrive Pulley

Upper

Upper induction manifold

Vert

Convertible

WOT

Wide Open Throttle

Y

A type of exhaust mid-pipe, joining two pipes into one pipe, a second "y" can be used to split the pipes for a "fake"-dual exhaust setup.

X

A type of exhaust crossover pipe in the shape of an "X"