Stage 3 Motorsports
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We offer free shipping on our cat back kits from Roush, Steeda, MAC & Magnaflow. We still sell the Saleen S351 Center Exhaust kits. We also offer the roush side exhaust at the best price anywhere.

1999-04 Ford Mustang GT SSS Exhaust System - Adrenaline
by SSS Exhaust
our price: $379.95
The sound of a Stainless Steel Systems is distinct and often referred to as "the Deep Muscle Car Sound". We have dyno tested our catback system an...
1999-2004 Roush V8 Mustang Side Exhaust System (Standard Sound)
by Roush Performance
our price: $869.99
99-04 Roush V8 Side Exhaust System (Standard Sound). This kit comes with everything you will need to convert your 99-04 GT Mustang to side exit ex...
1999-04 Roush V8 Mustang Side Exhaust System (Enhanced Sound)
by Roush Performance
our price: $869.99
1999-04 V8 Roush "Enhanced Sound" Side Exit Exhuast System. This kit comes complete with everything you will need to convert you 99-04 GT mustang ...
1999-04 Mustang Saleen S351 Center Exhaust Kit
by SALEEN
our price: $895.95
Original equipment on 02-04 S281-E and 2004 Saleen Mustangs. Includes intermediate pipes, mufflers, tail pipes, and hardware. Requires our Center...
1996-98 Mustang GT/Cobra Magnaflow Catback Exhaust System
by Magnaflow
our price: $496.65
Fits 4.6L V8, 1996-1998 GT/Cobra, 4x9x14" Muffler, 2.5" Tubing, Rear Exit, 3.5" Tip
1999-04 Cobra Magnaflow Cat-Back Exhaust System
by Magnaflow
our price: $539.84
4.6L V8, Cobra W/IRS, 4x9x14" Muffler, 2.5" Tubing, Rear Exit, 3.5" Tip
1999-04 Mustang GT Cat-Back Exhaust System
by Magnaflow
our price: $459.86
1999-04 Mustang GT - 4.6L V8 4x9x14" Muffler, 2.5" Tubing, Rear Exit, 3.5" Tip Features large diameter, mandrel-bent extensions and tailpipes tha...
1999-04 Mustang GT Magnaflow Magnapack Exhaust System
by Magnaflow
our price: $496.65
4.6L V8, GT, Dual Magnapack System, 4x4x14" Muffler, 2.5" Tubing, Dual Rear Exit, 3.5" Tips Magnapack system utilizes a round style muffler to pro...
1996-04 Mustang GT & 1996-98 Cobra MAC 2.5" Exhaust System 3'' Tips
by Mac Performance
our price: $313.03
1996-04 Mustang GT & 96-98 Mustang Cobra 2.5" System with 3" Tips. This complete cat-back system from MAC will give great HP gains and improve the ...
1996-04 Mustang GT & 1996-98 Cobra MAC 3" Exhaust System 3.5'' Tips
by Mac Performance
our price: $499.99
1996-04 Mustang GT & 96-98 Mustang Cobra 3" System with 3.5" Tips. This complete cat-back system from MAC will give great HP gains and improve the ...
1996-2004 Mustang GT Spintech SCS333 Mufflers (Roush Replacements)
by Spintech
our price: $249.95
Spintech 333SCS muffler set. These are weld in replacements for SM01 and SM02 Roush side exit exhaust kits. These are special order and take about ...
1999-04 Mustang GT/Mach 1 SLP "Power-Flow" Exhaust System (Modular)
by SLP
our price: $474.95
SLPs Mustang cat-backs have always been the best performing exhaust systems in the business. Now theyre the most versatile, too! Using groundbreak...
1999-04 Mustang GT SLP "Loud Mouth" Exhaust System (Modular)
by SLP
our price: $472.99
SLPs Mustang LoudMouth has always been the best performing cat-back exhaust in the business. Now its the most versatile, too! Using groundbreaking ...
1999-04 Mustang GT SLP "Loud Mouth II" Exhaust System (Modular)
by SLP
our price: $494.99
SLPs Mustang LoudMouthII has always been the best performing cat-back exhaust in the business. Now its the most versatile, too! Using groundbreaki...
1994-97 Mustang GT/Cobra "Loud Mouth" Exhaust Kit (modular)
by SLP
our price: $524.99
SLPs Mustang Loud Mouth has always been the best performing cat-back exhaust in the business. Now its the most versatile, too! Using groundbreakin...
1998 Mustang GT/Cobra "Loud Mouth" Exhaust Kit (modular)
by SLP
our price: $524.99
SLPs Mustang cat-backs have always been the best performing exhaust systems in the business. Now they are the most versatile, too! Using groundbrea...
1994-97 Mustang GT/Cobra "Loud Mouth II" Exhaust Kit (modular)
by SLP
our price: $548.95
SLPs Mustang cat-backs have always been the best performing exhaust systems in the business. Now they are the most versatile, too! Using groundbrea...
1998 Mustang GT/Cobra "Loud Mouth II" Exhaust Kit (modular)
by SLP
our price: $519.95
SLPs Mustang cat-backs have always been the best performing exhaust systems in the business. Now they are the most versatile, too! Using groundbre...
1999-2004 Mustang GT JBA 2.5 Inch Cat-Back Exhaust Kit - Stainless Steel
by JBA
regular price: $550.00
our price: $439.95
save $110.05
This is the system your mean machine has been begging for. The JBA Performance Exhaust is a precision-tuned masterpiece designed to get the most o...
1999-04 Mustang Chicane S351 Center Exhaust Kit
by Chicane
our price: $499.99
1999-04 Mustang Chicane S351 Center Exhaust Kit Requires our Center Exhaust Saleen Rear Valance. Out of Stock - Will not be shipping at this tim...
1999-04 Mustang GT/Mach 1 Bassani 2.5" SS Cat-Back
by Bassani
our price: $749.95
Features: 2.5" diameter stainless steel tubing. Dual 4x8 mufflers. 3.5" single wall slash cut polished stainless steel tips. Stock location exit....
1999-04 Mustang GT/Mach 1 Bassani 2.5" Aluminum Cat-Back
by Bassani
our price: $589.95
Features: 2.5" diameter aluminum tubing. Dual 4x8 mufflers. 3.5" single wall slash cut polished stainless steel tips. Stock location exit. NOTE: ...
1999-04 Mustang GT/Mach 1 Bassani 3" SS Cat-Back
by Bassani
our price: $799.99
Features: 3" diameter stainless steel tubing. Dual 4x8 mufflers. 3.5" single wall slash cut polished stainless steel tips. Stock location exit Wi...
1999-04 Mustang Spintech Roush Style Side Exhaust Kit - Fits Roush Body Kit
our price: $799.95
Spintech 333SCS exhaust kit with Roush tips. These are special order and take about 1-2 weeks to ship. This price includes 2 Mufflers, 2 Inlet Pi...
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