Air & Fuel Delivery
Tire & Wheel
Belts & Cooling
Driveline & Axles
Accessories & Fluids
Electrical & Lighting
Tools & Equipment
Wiper & Washer
Out of Stock
Notify me when available
No Hassle Returns
Need help finding something?
Hedman Hedders increase performance and economy by improving the
efficiency of a car's engine. Hedders remove exhaust gases faster
and more efficiently than stock manifolds. Stock manifolds are
designed for low cost, and have a short restrictive design which
causes some exhaust gas to get bottled up in the cylinder. Because
of these residual exhaust gases in the cylinder, the size of the
new fuel charge is limited and engine temperature increases. Hedman
Hedders have smoothly contoured individual pipes for each cylinder.
These primary pipes create a suction effect, called scavenging,
which pulls the exhaust gases out. This creates additional velocity
in the cylinder and helps pull in the fresh fuel charge. Hedders
were originally developed for racing applications and Hedman
Hedders are carefully designed to provide the maximum increase in
power for passing, hauling loads, towing, etc. In some cases this
extra power contributes to improved economy because the engine does
not have to work as hard to pull a heavy load or conquer a steep
grade. Painted Hedder 2001-2005 Chevrolet / GMC Pickups Avalanche,
Sierra, Silverado, Cadillac Escalade EXT 4.8L 5.3L 6.0L 2WD;
1999-2005 1500-2500 Suburban, Tahoe, Denali, Yukon, XL, Cadillac
Escalade & ESV 4.8L, 5.3L, 6.0L 2WD/4WD; 2001-2005 1/2, 3/4 and
1 5/8 in.
Sold as a pair.
3/30/2019 3:00 PM
good so far
3/19/2019 12:46 PM
It was quick, easy, and trouble free
1/29/2019 2:35 AM
Great prices Great Parts
1/25/2019 7:50 AM
Perfect fit - quick shipping
12/18/2018 1:55 AM
Great company..Great communication..Fast shipping. A+++++++++++++++.<br>Will do business again.
10/7/2016 10:09 AM
price is cheap. site is easy enough to use. I wish shipping is included.
6/26/2016 10:43 AM
First time that I have tried Autoplicity. Best price on the brand/part that I really wanted. Fast turnaround, and they have great customer service. Will use again. Highly recomend!
6/20/2016 12:13 PM
Great transaction at a great price.
5/21/2016 5:19 PM
Fast shipping , product just as described, and quality product.
5/2/2016 2:50 PM
fast and easy website to use. Also had the best price on the part I ordered
2/8/2016 10:15 AM
Add your review
Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our