Needing more performance, MPG's and sound from your 2015 - 2017 Expedition/Navigator? Look no further! All of SPD's catted downpipes use the highest grade catalytic converters and larger 3" diameter mandrel bent tubing which improves throttle response, mileage and overall performance while reducing turbo lag and exhaust temperatures. Our Catted Downpipes will not cause CEL (check engine light).
 
On all SPD Performance's Aluminized Steel Catted Downpipes, you get:
 
	
Increase in performance
	
Improved turbo spool time
	
Better fuel mileage
	
High flow catalytic converters that do not cause check engine lights
	
High temp silica ceramic coated for long life span
	
Factory style flanged clamps on all flared turbo and exit connections
	
High grade clamps for a solid seal and no leaks
	
All hardware included 
 
Please allow up to 2 week for us to ship our downpipes. Please contact us for any expedited requirements.
 
These downpipes are not EPA approved and are for off-road use only.