Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededPATRIOT EXHAUSTPART NUMBER: 737-H8033-B
265-400 Small Block Header 1-5/8" Primary Tubes
$44469
Ships on 11/03/2026
Lowest Price GuaranteeGM
265-400 Small Block Header1-5/8'' Primary Tubes 2-1/2'' Collector Round Port Shape Hi-Temp Black Coating
Fits:
Fits:
- 1935-1948 Fat Fendered Street Rods (Most Chassis)
- Fenderwell exit.
- Outside frame exit.
- Universal application for most street rod applications.
- Can be used with any oil filter system or transmission and starter combination.
- Will fit most angle plug heads.
- Check motor mount position before ordering.
- Will work on automatic and manual transmissions.
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Full length and fenderwell headers provide the ultimate performance for street rodders with high performance engines. These header styles have longer primary tubes, which help produce more horsepower and torque than Tight Tucks.
Chassis headers fit inside the frame rails, but if there is not enough room, our "up and over" fenderwell headers will provide the same great performance with an awesome look.
See More Details for Applications Listing.
Show More
 | Dimensions (Inches) | ||||||
| Part Number | A-Left | A-Right | B-Left | B-Right | C-Left | C-Right | |
| 737-H8012 | 2'' | 2'' | 16'' | 14'' | 23'' | 27'' | |
| 737-H8017 | 3-1/2'' | 3-1/2'' | 16-3/4'' | 16-3/4'' | 19'' | 19'' | |
| 737-H8018 | 3-1/2'' | 3-1/2'' | 17-1/2'' | 17-1/2'' | 23-1/4'' | 23-1/4'' | |
| 737-H8021 | 4-1/8'' | 4-1/4'' | 15'' | 11'' | 23'' | 25'' | |
| 737-H8033 | 7-1/2'' | 7-1/2'' | 14-1/2'' | 14-1/2'' | 27'' | 27'' | |
| 737-H8035 | 10'' | 10'' | 17'' | 17'' | 29'' | 26-1/2'' | |
| 737-H8036 | 7'' | 3-5/8'' | 8-1/2'' | 8-1/2'' | 21'' | 22'' | |
| 737-H8429 | 3'' | 3-1/4'' | 18'' | 18-1/2'' | 19'' | 19-1/2'' | |
| 737-H8430 | 3-1/4'' | 4'' | 10-1/2'' | 6-3/4'' | 19'' | 18-3/4'' | |
Part TypeHeader
Product LinePatriot Street Rod Headers
BrandPATRIOT EXHAUST
Package Height11.5
Package Width20.5
Package Length39.5
Weight24.8 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Primary Tube Outside Diameter1.625 in (41.275 mm)
Vendor Part NumberH8033-B
Package Qty1
Package TypeEA
Some parts are not legal for use in California or other states with similar laws / regulations
