Chevy Nova 5.7L Automatic Transmission with Small Block Engine 1974, Steel 3/4 Length 4-1 Exhaust Headers with Adapters by Doug Thorley Headers®. Collector Outlet Diameter: 3". Emissions: EPA compliant. Are you tired of dragging your long tube headers on the ground every time your lowered car hits a bump? If so, then these headers are for you! Just a little shorter than true long tube headers, Doug's designed these to give you the maximum in performance while keeping them short enough to not smack the ground when the road gets a little bumpy. Of course the shorter design makes for a bit easier of an install than long tubes also, you definitely don't need to be lowered to run these. To make these headers last, Doug's made them out of industry leading 14-gauge tubing with 3/8" thick flanges. Doug's headers come beautifully ceramic coated to greatly reduce surface temperatures and protect them from the environment. All 100% American made, and backed by Doug's lifetime warranty. Install these headers today and feel your vehicle's true power potential!
- Fits With Straight or Angle Plug Heads.
- This is a Federal (EPA) compliant part, legal for use on vehicles built to meet Federal EPA standards ONLY. It is NOT legal for installation on vehicles required to meet CARB standards and/or registered in California and other states which follow CARB standards.
|Header Material: Steel|
|Collector Diameter: 3"|
|Emissions: EPA compliant|
|Header Style: 3/4 Length 4:1 Header|
|Finish: Silver Ceramic Coated|
|Primary Tube Diameter: 1-5/8"|
|Primary Tube Gauge: 14 Gauge|
|Collector Attachment: 3-bolt Flange|
|Flange Thickness: 3/8"|
|Bolts and/or Studs Included: Yes|
|Gaskets Included: Yes|
|Reducers/Adapters Included: Yes|
|Y-Pipe (Crossover) Included: No|
|Weld Up: Adapters must be welded to exhaust system|
|Quantity: Sold as a Pair|
|Warranty: Limited Lifetime to original purchaser|
For over 50 years, Doug Thorley Headers has been an innovator in the automotive aftermarket. Driven by a passion for performance and superior quality, they are committed to developing 100% American-made products that will reliably deliver maximum horsepower and torque. Doug Thorley Headers® has been pushing the limits of automotive technology since they first invented the Tri-Y header in 1958, and they do it all on American soil.