Those Dumps tho <3 <3 <3Factory/Shorty headers:
http://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=imgres&cd=&cad=rja&uact=8&ved=0ahUKEwikiPmT1NvKAhUFjywKHXlqBEgQjRwICTAA&url=http%3A%2F%2Fblog.caranddriver.com%2Fholy-flat-plane-crankshaft-we-finally-get-an-in-depth-look-at-the-ford-mustang-shelby-gt350gt350rs-5-2-liter-v-8%2F&psig=AFQjCNGyEvJrUOZpFL0xozF1Iy_jup76pw&ust=1454591075342099
Longtube headers:
The Coyote engine comes with already quite good factory tubular headers. Switching to aftermarket shorty headers really doesn't improve much. Longtube headers increase exhaust flow significantly and can yield up to 20-25rwhp gains over stock.
Longtube headers eliminate the factory catalytic converters which means technically they fail emissions and are actually illegal to install on emissions-controlled street vehicles. There are ways to get around this but if you are not ready for the hassle I'd recommend keeping the factory headers and cats.
Another downside to longtube headers beside legality is how loud the exhaust can be especially with a catback exhaust system. You will sound like a racecar and will draw a lot of attention.
Also some other info from what I've learned in the past (correct me if I'm wrong guys). Short Tube headers give you more power on top end, Long Tube headers give you good torque on low end and also give you good top end power but not as much as shorties on the top end. Long Tubes tend to give you well rounded power, but you really feel it on the low end.
That's how the HEMIs responded to those headers. I figured the response might be the same.There really hasn't been a trend to support that when talking about the Coyote engine. Basically installing longtube headers increases power throughout the powerband, shorty headers just less so. Changes to the tune will have a more drastic effect to the power curve than just what type of exhaust manifold is bolted to the engine.
kinda. might be like splitting the difference. I've been considering this route too, since I live in VA, and don't want to eff around with being catless and being screwed when it's emissions/inspection time.I've been considering getting the MAK Cat deletes and welding flanges on the stock cats and cat delete pipes (so I can swap the two out easily, if need be) because I live in CA and they don't like us to have anything fun. Would eliminating the cats this way give me gains close to what adding long tube headers would be? Seems like if the gains are relatively close, the difference in cost for LT headers wouldn't be worth it.