NEW SOUTHWEST SPEED BLACK ZOOMIE HEADERS FITS SMALL BLOCK CHEVY 265-400 V8 FOR DEMO DERBY, TRUCK/TRACTOR PULLEY, SAND RAIL, MUD BOGGER Pair Of Brand New Southwest Speed Flat Black Zoomie Headers For Small Block Chevy 265-400CI Engines For Demo Derby, Truck And Tractor Puller, Sand Rail, And Similiar Applications (SWS Part # 440-21522B) We Believe These Headers Were Originally Designed For Demo Derby Cars, But They Are Commonly Used On Rock Crawlers, Mud Boggers, Truck And Tractor Pullers, Sand Rails, Rat Rods, Drag Cars And Numerous Other Vehicles Where The Exhaust Is Routed Straight Up Or Out The Hood, About Anywhere A 4-Tube Small Block Chevy Zoomie Header Is Required Not For The Faint Of Heart, These Produce A Lot Of Noise And A Little Fire |* Increases Ground Clearance, Reduces Under Vehicle Temperatures, And Increases Horsepower |* Features 1-5/8" O.D. 16 Gauge Seamless Tubing And Comes Complete With Header Bolts And Gaskets |* These Headers Are Ground Parallel With .350" Flanges On The Cylinder Head Surface |* Fits Angle Or Straight Plug Heads, No Spark Plug Or Spark Plug Wire Restrictions |* 4 Tube Inline Stack Design, "Zoomie Style", Without Collectors Features: | * 1-5/8" Primaries | * Top Of Exhaust Port To Top Of Header Tubes, 26" | * Great For Demolition Derby, Rock Crawlers, Mud Boggers, Truck And Tractor Pullers, Sand Rails, Rat Rods, Drag Cars, And Numerous Other Vehicles | * Reduce Under Vehicle Temperatures, Increase Performance | * Nice Choice To Replace Cast Iron Exhaust Manifolds | * Enhances The Looks Of Any Rod | * Includes Bolts And Gaskets | * Painted Flat Black To Resist Early Corrosion Applications: | * Fits 265-400 CU. IN. Standard, Vortec, And D-Port ZZ-4 Heads (Not LT-1) | * Fits All Small Block Chevrolet V-8 Engines With Standard Exhaust Pattern