100% brand new, Never been tried or installed. Made out of 304 stainless steel and offer great quality. Primary Diameter 1-3/4 in. Collector Diameter 3 in. Head Flange Thickness 3/8 in. Pipe Thickness 16 gauge (1.5mm). Professional installation is highly recommended. Installation Instruction is NOT Included. For LS motor swap on 60-98 Chevy/GMC trucks (2WD) Fits LS based engines LS1, LS2, LS3, LS6, LS7, etc. For Exact Years and Models, Please Check Compatibilities. LS Swap Tube Headers 1-3/4 For Chevy Pontiac Buick LS1 LS2 LS3 LS6 LS7 Pair. Hardwares such as Gaskets as Shown in the Picture Above. Will NOT fit LS4 engines. Will NOT work on 4WD/4×4 models. Will NOT work on standard SBC or BBC. Will NOT install with factory column shift linkage. May require special motor mounts for clearance. May require angled spark plug boots for tight clearance. If using larger 4L80E or older THM 350/400 automatic transmissions the bellhousing ears may need to be trimmed for proper clearance. Header Primary / Collector. 1 3/4″ / 3″. 4.1L 4.3L 5.0L 5.7L 6.5L. Chrome Polished Stainless Steel. OE Spec or Performance/Custom. The orders of Friday would be shiped in the next Monday. Our office hours are 8:00 a. M to 5:00 p. M (GMT +8) of Monday to Friday. And our Office is closed on weekends and public holidays. We apologize for the late reply during the holidays. Radiator Coolant Overflow Tank. Brake Line Clamp & Screw Stree. Mud Flap Hanger set. STAINLESS STEEL LAKE STYLE HEADERS For SBC 265-400 V-8 CHEVY, HOT ROD, STREET, RAT. 4Pcs 3 Stainless Exhaust Band Clamp Step Clamps for Catback Muffler Pipe. Stainless Steel Headers Manifold w/ Gaskets for Chevy GMC 07-14 4.8L 5.3L 6.0L. 3/8 20ft G70 Transport Tow Chain Tie Down Binder Chain Flatbed Truck Traile. 2x Chain Coupling Link 1/2 G80 Hammer Lock Connector 12000lb Hammerlink Red. 4x Chain Coupling Link 1/2 G80 Hammer Lock Connector 12000lb Hammerlink Black. 4x Chain Coupling Link 1/2 G80 Hammer Lock Connector 12000lb Hammerlink Red. (2) 3/8″ x 35″ G70 Tow Trailer Safety Chains w/ Forged Safety Hooks.