I'm looking into a set of headers for my Z and i've got the Thorley's at the top of the list for there price. I was wondering about what rpm range did you notice the most gains at and if they affected the sound that much. I know the Thorleys are more for mid-range but i was wondering if anyone could tell me if they saw anything at about 2000 rpm or so. From a take off my truck's really been a dog until about 2500 since the added weight of my wheels and tires so i was wondering if its going to boost that any. And is everybody that bought some happy with them so far?

 

I do a lot of towing so theThorley's low end torque was the selling point for me. With a Yukon w/4 wheel drive, I have a heavy truck to begin with. Pulling an enclosed trailer with 7500lbs, I could keep the cruise in OD at 74 mph without sifting out. Before the Thorley's, I had to do about 78mph. So for me, the torque impovement was seen at about 2000rpm. Hope this helps!

 

thanks for the info.....everybody else happy with theirs?

 

Im very happy with mine with the exception of the noise made when I turn the wheel all the way. The midrange torque is very impressive.

 

I've had them for about a year and love them. No prob with leaks or rust. Sound great and took .1 off 1/8th time.

 

I ordered a set of ceramic coated tri-y's on 8-19-2004. I just got an e-mail from summit saying they talked to the people at thorley and summit will get them in 7-10 days. So I'm looking at at least another 14-20 days. I'm really pissed and if I have any problems with clearance or anything I am gonna freakin go off on somebody!!!!!!! BTW I am paying like $550.00 plus s&h.

 

i appreciate everyone's input, but after doing some research....added with the fact i can get a set fairly cheap. Im kinda sold on the TOG's. Thorley makes a great header for mid-range, but i'm gonna go with something that's gonna benefit me more on the low side. But thanks anyway guys!

 

ever check out LaPoles, Mid Length, 1 3/4 primaries.