sly

Won't pass. They are not cats. You will need cats. Dynatec offers cats. They may bolt up to your OBXs.

Truetrac for street Detroit for the strip.

Driver side Cat went on my XL Denali. Had the same symptoms. Bad cat. Their is a way for the shop to pull the 02 sensor after the cat and check the flow. I took the truck to the dealer and they replaced the cat. If you are under 80k and it is the cat the dealer should replace it.

Orange

Why the Dexron III and not the new synthetic?

For what it is worth JBA's website shows a dyno sheet from a '04 HD 6.0 with their headers, evol exhaust and wires. It shows a 30hp gain at @4400 rpms.

Mcgaughy's

Spindles

I bought a Sport cat back exhaust back in '03. It developed a rattle in the muffler. Called Corsa, gave them my info from the original order. Was told they would research it. Later that day I received a call back. Was told no problem. Shipped out the replacement parts that day. Received everything, R & R the exhaust, re packed old items and returned to Corsa via the return shipping labels. Their Customer service was fantastic. I highly reccomend them.

I never thought about running a 0W- oil in Texas....I might give it a try next oil change.

I bought mine (for a Yukon XL Denali) direct from Corsa. I have used Tbyrne for other purchases and they are great. BTW I used to live in Lewisville.

I had a set of Edelbrocks and they were great. You may check and see if they make them for your truck.

So, Instead of a 6qt oil change add another 1/2 a quart for the added capacity? Or did you just leave it at 6qts?

No drone at all at any speeds. The exhuast sounds great at school zone speeds to well into triple digit speeds. The best exhaust I have ever owned.

After reading this thread I think I will just buy some power slots.