Order by phone 1-888-401-1362
  

 Shop Flowmaster   Marken Performance  1-888-401-1362 

 
   Flowmaster® part # 817515 is a new Outlaw series cat-back that fits 2005-2010 Ford Mustang with 4.6L or 5.4L engine, including hardtop and convertible. 
   This bolt-on DOR (Dual Out Rear) emissions-legal system for cars with the 4.6L or 5.4L V8 engines features a pair of race proven Outlaw series mufflers and dual mandrel bent 2.5” inch pipes.  The aggressive, loud outlaw mufflers are 2.5” in and 3” out and can be installed at Marken Performance.  The system is built out of 409S stainless steel and utilizes 4” polished stainless steel flowmaster embossed tips. This exhaust system also fits convertible and GT500 models. 
   To enter for the FREE one, click on the picture and fill out entry form.
   For more Rebates, Promotions, click on our 
  
    Current Deals  
  
  
  
  
 
  
   Proper exhaust-pipe size is a function of both engine output and displacement. The higher the engine’s output, the larger the pipes should be. Likewise, larger engine displacements call for bigger pipes. But you don’t want to become a victim of “More’s Law,” either: While up to a point reducing exhaust restriction generally helps both power and gas mileage, going too large can over-scavenge an engine and actually decrease engine output as well as fuel efficiency. The accompanying exhaust system size guidelines are compiled from Flowmaster Mufflers and RoadkillCustoms.com data. To avoid becoming a restriction, all muffler and catalytic converter inlet and outlet sizes should correspond to the exhaust pipe sizes, and design your exhaust system to use the minimum number of bends.  
   

   Exhaust Pipe Sizes For Street Performance

Pipe OD (in)

 

Power HP

  

Engine Size cu in

Single

Dual

2.0

2.0

100

 

150–200

2.25

2.0

150

2.5

2.0

200

2.25

2.0

150

 

200–250

2.5

2.25

200

2.5

2.25

250

2.5

2.0

200

 

250–300

2.5

2.25

250

3.0

2.5

300

3.0

2.5

250

 

300–350

3.0

2.5

300

3.5

2.5

350

3.0

2.5

300

 

350–400

3.5

2.5

350

4.0

3.0

400

3.5

2.5

350

 

400–450

4.0

3.0

400

4.0

3.0

450

4.5

3.5

400

 

450–500

4.5

3.5

450

4.5

3.5

500+

 

Comment Post Comment

Join Our Newsletter