Stock air filter & cat-back exhaust

What is the minimum average HP / TQ gained from adding ARH long tube headers to an early 5.7L with a DAP tune using the stock air filter & cat-back exhaust?

I am not interested in extracting the maximum HP / TQ, I just want to know how ARH long tubes and DAP affect an otherwise stock Tundra 5.7L engine.

https://americanracingheaders.com/p...nnect-long-system?_pos=6&_sid=c3c476375&_ss=r

 

I'd love to see actual member dyno's for any of the mods

 

You would think a vendor would offer this kind of information.

 

JBA and ARH should be able to figure out a way to put a minimum performance number on their product running through the factory exhaust, that's all I ask. Allow the customer to decide if he wants / needs to chase more power.

Manufacturers of cat back systems can use those ARH & JBA numbers to market their kits with customers knowing how much power is gained by replacing the factory cat-back with an aftermarket kit. They can also come up with better exhaust kits that are 100% factory replacement kits with improved minimum power gains for certain applications.

Remove as much of the confusion and guesswork from the buying process for the CUSTOMER.

 

I have been gathering numbers from different sources, and it looks like the 1-3/4" cat-less ARH Direct Connect header system that I am looking at would add 20 to 25 hp as a stand alone mod.

 

From what I gather a basic cat-back adds another 3 to 10 hp, and a cold air kit adds another 5 to 10 hp but only after the exhaust is free flowing.