Thorely 310Y-49 ..... no egr fittings
fit ...... 99-2008 GM NBS / Tahoe etcetc 4.8-5.3-6.0 2wd/4wd

Freshly glass blasted were on my 2004 2yrs excellent header for low end torque wont fit my 2010

$300.00 ship from zip 58271

Link http://dougthorleyheaders.com/products/productID/622

PM me for Pics .......

 

Why didn't fit your 2010? Will they fit my 2008 5.3?

 

Interested...
Pics of your's?

How do they do on the top end, fall off at all?

 

2009 and up driver side motor mount redesigned 310Y-49 header hits motor mount on 09 and up .......so will fit 2008 and earlier .check with Thorley for clarification

To be clear the -49 version has a flash nickel finish ...... the pic on Thorely site makes it look like ceramic ...... I glass blasted to clean them up no rust / pitting etc but no shiny finish

 

I will get pics but not til wed ............. this header design is real strong til 4500 .........in my truck pulled even til 5500 but it was a stock truck for towing ...........if it a race truck with big cam and 6000rpm plus then not the right header .........

 

10-4... I was gonna try to make up for some of the low end that I'm gonna lose with my cam, since I do some towing, it's not gonna be a big cam, but I'm gonna spin it to about 6400.

Thanks!
GLWS

 

These are good quality headers IMO. The set I put on my 03 truck went in fairly easily and have held up good to the weather (no rust). Oh and I spin my tsp 220 cam to 6500 with no problems and I haven't got a stall converter yet... Free bump

 

Thanks .....yes great quality .Thats why I bot another set for my 2010CC ....I agree really I doubt you would lose much over big tube header on a street ruck but I dont want to oversell .......they definitely move the max torque down lower than a typical 4 tube and most of us want max torque low to move our heavy trucks

 

Bumped

 

PM me for pics ............