FREE Shipping on Most $75+ Orders

Patriot Exhaust H7863 Header Flange Pair Chevrolet Small Block 265-400 Tube Diameter 1 5/8" Oval Port

Yittzy
Patriot Exhaust Patriot Exhaust H7863 Header Flange Pair Chevrolet Small Block 265-400 Tube Diameter 1 5/8" Oval Port
Hover to zoom
Patriot Exhaust

Patriot Exhaust H7863 Header Flange Pair Chevrolet Small Block 265-400 Tube Diameter 1 5/8" Oval Port

MPN: H7863UPC: 694342505073
In Stock
Almost gone! Only 3 remaining
$65.88$75.37SAVE 13%
Starting at $6/mowithaffirm
12 months
Fits:Universal Fit

Header Flange - 0.375 in Thick - 1.5 x 1.84 in Oval Port - Steel - Natural - Small Block Chevy - Pair

1

Secure Checkout

SSL Encrypted

Easy Returns

30-day policy

Guaranteed Fitment

Or your money back

Pay Over Time

With Affirm

Usually ships in 1-3 business days

Header Flange - 0.375 in Thick - 1.5 x 1.84 in Oval Port
- Steel
- Natural
- Small Block Chevy
- Pair

Earn 65 Yittzy Rewards points with this purchase — 1 point per $1 spent. Join free

Installation Overview

Difficulty
🔧🔧🔧⚪⚪
Intermediate
Est. Time
2-6 hrs
Skill Level
Intermediate
Pro Install
Optional
Common Tools: Socket set, Screwdriver set, Torque wrench
Read our Performance Upgrades Guide →

Compare Exhaust Flange Options

See how this product compares at different price points

Budget Pick
Exhaust Flange; 4.4375 in. BHC; 3.5 in. ID; 4.8125 in. Flange W; 4.6875 in. Flange H; 0.375 in. Thickness; Stainless Steel; 3 Bolt; Single Flange; Retail Packed; 1pc.;

Vibrant Performance

Exhaust Flange; 4.4375 in. BHC; 3.5 in. ID; 4.8125 in. Flange W; 4.6875 in. Flange H; 0.375 in. Thickness; Stainless Steel; 3 Bolt; Single Flange; Retail Packed; 1pc.;

$44.99

Best Value
Current
Patriot Exhaust H7863 Header Flange Pair Chevrolet Small Block 265-400 Tube Diameter 1 5/8" Oval Port

Patriot Exhaust

Patriot Exhaust H7863 Header Flange Pair Chevrolet Small Block 265-400 Tube Diameter 1 5/8" Oval Port

$65.88

Premium Pick
Exhaust Flange; 4.1875 in. BHCC; 3 in. ID; 5.0625 in. Flange W; 3.6875 in. Flange H; 0.375 in. Thickness; 304 Stainless Steel; 2 Bolt; Box Of 5 Flanges;

Vibrant Performance

Exhaust Flange; 4.1875 in. BHCC; 3 in. ID; 5.0625 in. Flange W; 3.6875 in. Flange H; 0.375 in. Thickness; 304 Stainless Steel; 2 Bolt; Box Of 5 Flanges;

$139.99

Complete the BuildMore from Patriot Exhaust

Patriot Exhaust H7402 Side Exhaust Universal Hookup Kit

Exhaust Pipe Installation Kit

Patriot Exhaust H7402 Side Exhaust Universal Hookup Kit

$126.27

Patriot Exhaust H7054 16 gauge 1 1/2" tube diameter, 3" radius 6" 15" legs

Exhaust Pipe

Patriot Exhaust H7054 16 gauge 1 1/2" tube diameter, 3" radius 6" 15" legs

$65.88

Patriot Tight Tuck Header 08-67 Street Rod 273-360 SBM LA 1 5/8" Primary 2 1/2" Collector Raw Steel H8205

Exhaust Header

Patriot Tight Tuck Header 08-67 Street Rod 273-360 SBM LA 1 5/8" Primary 2 1/2" Collector Raw Steel H8205

$401.95

Patriot Exhaust H3017 Muffler Smithy 26" 2 1/2" Inlet/Outlet

Exhaust Silencer Insert

Patriot Exhaust H3017 Muffler Smithy 26" 2 1/2" Inlet/Outlet

$104.28

Patriot Mid Length Header 64-92 GM F, G, A Body 265-400 SBC 1 5/8" Primary 3" Collector Hi Temp Black Coated H8021-B

Exhaust Header

Patriot Mid Length Header 64-92 GM F, G, A Body 265-400 SBC 1 5/8" Primary 3" Collector Hi Temp Black Coated H8021-B

$392.01

Patriot Exhaust H7038 18 gauge 2" tube diameter, 4" radius U-bends

Exhaust Pipe

Patriot Exhaust H7038 18 gauge 2" tube diameter, 4" radius U-bends

$32.91

Buying Guides

Jeep Performance Upgrades GuideJeep Exhaust System Buyer's Guide: Cat-Back, Axle-Back, and Headers
Compare Exhaust FlangeBest Exhaust Flange →

Related Articles

Top 2 Must-Attend Jeep Events This June 2026

Jeep Culture · Jun 5, 2026

Guide to West Virginia Almost Heaven Jeep Fest 2026

Jeep Culture · Jun 5, 2026

Guide to South Dakota Badlands Jeep Adventure 2026

Jeep Culture · Jun 5, 2026

You May Also Like