Long tube options?

**Padre Prince** · 07-20-2009, 12:27 AM

What are the differences between the various LT headers. ( JBA, Kooks, dynatech...)
If this has been brought up and I missed it please link the thread. Thanks

**05silvhemimag** · 07-20-2009, 01:09 AM

imo dynatech, y, because of quality, i havent seen better welds besides my fathers, witch has been doing it for 30 years and is a forman on the union within 2 years.... plus the high flow power cats are as small as it gets... but watch out for speed bumps.

**Padre Prince** · 07-20-2009, 07:25 AM

I am riding at stock height so that wont be as much of a problem for me as it is for you. ( from your sig you seem to be lowered ) Thanks for the advice.

**dudeiwin86** · 07-20-2009, 09:54 AM

2 of my buddies dynatech welds failed at the flange on the backside/bolt side.
we attributed this to the fact that longtubes scrape, and the upward pressure from speed bumps and stuff breaks the welds over time.

we pulled the headers and rewelded them, no biggy.

i still prefer Kooks. they have an exact port match, where as the Dynatechs are round and not an exact port match.

**stevesrt8** · 07-20-2009, 11:48 AM

kooks are almost perfect, an they fit tight.

Never seen better.

**CoolVanilla** · 07-20-2009, 11:57 AM

Both Dynatech and Kooks are good calls. I've got Dynatechs mounted up to my NA 5.7 based stroker, which pumps out 540/580 at the fly.

But I do see the value in the port matched Kooks, and had they been available when I was looking, I probably would have gone that route. Would it have helped my numbers? Not 100% convinced. But I don't think it would have hurt.

**Padre Prince** · 07-20-2009, 04:40 PM

I like the kooks, but I have seen several people that say the hiflow cats burn out. What causes this? My plans for the engine include a cam, LT headers, underdrive pulley. (at least till I get a hybrid, then it's 426 in 5.7 out.) This is in addition to the cat back, intake, and predator I already have. Should I look at different cats or would I be fine with the kooks and my mod plans?

**dudeiwin86** · 07-20-2009, 04:42 PM

Kooks cats will be fine.
ive seen more dynatech cats burn up than kooks.
but it has more to do with the tune, and how often you drive on the cats.

hf cats are more for racing and dont stand up to the daily abuse like a stock cat does.

**Padre Prince** · 07-20-2009, 05:16 PM

Originally Posted by dudeiwin86

Kooks cats will be fine.
ive seen more dynatech cats burn up than kooks.
but it has more to do with the tune, and how often you drive on the cats.

hf cats are more for racing and dont stand up to the daily abuse like a stock cat does.

I knew that the hf cats would increase hp, but I didn't know they wouldn't hold up for the daily? If I got lt headers and left the stock cats would that be a dumb move? Or should I just use the hf cats till there gone and get some more? How long would they last in an average daily driver. Say 12000 mi/ year? Oh and thanks for the advice everyone.