Description

Big Block Chevy 2-1/4″ Upright Headers with 4″ Collector- Black FinishCNC Mandrel-bent tubes provide consistent tubing diameters for smooth flow and increases the cylinder scavenging effect and improves engine breathingHeavy duty 16-gauge 409SS tubing for increased strength and durability2-1/4â? tubing diameter for increased exhaust flow increasing performance and improved throttle responseExtended 4â? collector for maximum strength and exhaust flowExtra thick 7/16â? header flange for a leak-free seal and maximum strengthWelded-in collector merge spears to control exhaust gas re-entry into primary tubesCenter of exhaust port to end of collector length is 33-1/2″

Air Injection Tubes:No

Application: Big Block Chevy

Bolt size:3/8-16 x 3/4 IN

Bolts Included: Yes

Catalytic Converter Quantity: 0

Collector Attachment: Weld-On

Collector Diameter: 4.00″

Collector Port Diameter: 4.00″

Collector Reducer Included:No

Collector Reducer Outlet Diameter:N/A

Color: Black

Design: Upright

Drive: 2WD

Drive: 4WD

EGT Port: No

Engine: GM Big Block

Finish: Painted

Flange Thickness: 0.4375″

Flange Thickness:7/16 IN

Gasket Or Seal Included: Yes

Grade Type: Performance

Header Series:Flowtech

Header Style: Upright

Material: 409 Stainless Steel

Mounting Hardware Included: Yes

Oxygen Sensor Port: No

Port Shape: Round

Primary Tubing Diameter:2 1/4 IN

Primary Tubing Diameter:2.25 IN

Quantity: Sold as a Pair

Sheen Level: Satin

Tube Wall Thickness: 16 GU