Flowmaster American Thunder kit

[03BlkZ]

Is anyone here using this kit? I seems like a pretty good kit made for lowered trucks. I do have headers but I assume I can modify the mid pipes to connect. Thoughts?
https://www.holley.com/products/exha...r/parts/817654

[TXgearhead67]

I have this kit. I installed it while I had the cab and bed off. Very good fit. I’m using hooker long tubes so I had to get some collector flanges. No big deal. I haven’t started the engine yet so no info on sound.

[03BlkZ]

Originally Posted by TXgearhead67

I have this kit. I installed it while I had the cab and bed off. Very good fit. I’m using hooker long tubes so I had to get some collector flanges. No big deal. I haven’t started the engine yet so no info on sound.

I am also using hooker long tubes so that's great to hear. I also bought 2.5 inch collector flanges. So everything adapted easily I assume?

[TXgearhead67]

Yes adapted good. The only thing I didn’t like was how the h pipe was meant to be run. I just didn’t put it in.My plan is to make a h pipe with a flange so I can remove it for transmission access later. I haven’t done that yet.

[03BlkZ]

Originally Posted by TXgearhead67

Yes adapted good. The only thing I didn’t like was how the h pipe was meant to be run. I just didn’t put it in.My plan is to make a h pipe with a flange so I can remove it for transmission access later. I haven’t done that yet.

Thanks!