1.)Product ID: 59976 Category: Magnaflow Universal Catalytic Converters-Spun Metallic Substrate High Flow
2.5" ID Angled Outlet High Flow 300 cell Metallic Substrate Magnaflow Catalytic Converter 59976
Description: 2.5" ID Angled Outlet High Flow 300 cell Metallic Substrate Magnaflow Catalytic Converter 59976
Price: $297.81
Sale Price: $97.06
Savings: $200.75


2.)Product ID: 59956 Category: Magnaflow Universal Catalytic Converters-Spun Metallic Substrate High Flow
2.5 " ID 300 cell density Metallic Substrate Universal Catalytic Converter Magnaflow 59956
Description: 2.5 " ID 300 cell density Metallic Substrate Universal Catalytic Converter Magnaflow 59956
Price: $247.86
Sale Price: $80.87
Savings: $166.99

3.)Product ID: 59926 Category: Magnaflow Universal Catalytic Converters-Spun Metallic Substrate High Flow
2.5" High Flow 300 cell density Metallic Substrate Universal Magnaflow Catalytic Converter 59926
Description: 2.5" High Flow 300 cell density Metallic Substrate Universal Magnaflow Catalytic Converter 59926
Price: $255.98
Sale Price: $88.97
Savings: $167.01

 

its for a 5.4 L 04 F150 Fx4

 

Well I bought two of the 59956 cats, which are so small and nice. the difference btw the 59956 (9" long) and the 59926 (11" long) is that one is longer than the other. I got the shorter one figuring for better flow. My friend with a 1999 f250 5.4 also bought just 1 of these cats (59956) and put it on after the y pipe and passed the emissions, but remember that the f250's have a less strict emission and only have 2 cats stock. you should be fine with just 2 of the 59956 cats and remove the 4 stockers. By the way the truck will be much louder!!!! these cats are soooo light apposed to each stocker weighing a good 5+++ pounds.
Good luck, Mark

heres a sound clip of my friends lifted f250 with a flowmaster dual exhaust, magnaflow metallic cat, and throttlebody sapcer

http://www.facebook.com/video/video.php?v=503583893382

http://www.facebook.com/video/video.php?v=10824546146

 

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