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Forced Induction SystemsDetailed discussions regarding cold-air intake systens, superchargers, turbo chargers, and other induction systems for your vehicle.
This is a discussion thread titled "5.7/4.7 Exhaust the same", within the Forced Induction Systems forum, part of the Technical & Vehicle Assistance Forums category.
Yup 5.7 flanges are bigger, So I decided to make it work. Cut out second cats behind rear O2 sensor, tigged on some stainless bends and made the 5.7 cat back work. Sounds great and fits the look of the truck now. Lucky I had some old subaru exhaust flanges that came off the race car that mated up perfectly, with the donut gasket. Know my two cars are bonded for life. Gained 18whp on a mustang dyno 20ftlbs torque, with catback and drop in panel filter. Not bad for a $600 investment. This is on a 4.7liter.
Matt
I will post dyno sheet when I get a chance.
Yup 5.7 flanges are bigger, So I decided to make it work. Cut out second cats behind rear O2 sensor, tigged on some stainless bends and made the 5.7 cat back work. Sounds great and fits the look of the truck now. Lucky I had some old subaru exhaust flanges that came off the race car that mated up perfectly, with the donut gasket. Know my two cars are bonded for life. Gained 18whp on a mustang dyno 20ftlbs torque, with catback and drop in panel filter. Not bad for a $600 investment. This is on a 4.7liter.
Matt
I will post dyno sheet when I get a chance.
I thought about doing something similar. I wanted a stock 5.7 exhaust on my 06, complete with the huge stock 5.7 muffler. It should flow well enough for a 4.7 but still remain quiet.
Just so I am clear on it, did you use the stock 5.7 muffler or the Magnaflow cat back which was meant for the 5.7?
I thought about doing something similar. I wanted a stock 5.7 exhaust on my 06, complete with the huge stock 5.7 muffler. It should flow well enough for a 4.7 but still remain quiet.
Just so I am clear on it, did you use the stock 5.7 muffler or the Magnaflow cat back which was meant for the 5.7?
5.7/4.7 Exhaust the same
Linear Mode
