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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
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Description
Mr. Gasket Copper Seal Header Gaskets - 7171MRGOverview: Mr. Gasket CopperSEAL Header Gaskets are a high quality copper gasket that performs extremely well and are reusable. We recommend this in all racing and high performance applications. They are for stock heads unless indicated, and work well in high heat and turbocharged applications. Features: Manufactured from Dead Soft (solid) . 043" thick copper material . 051" embossment around each exhaust port to seal irregular surfaces. Total gasket
Overview:
Mr. Gasket CopperSEAL Header Gaskets are a high quality copper gasket that performs extremely well and are reusable. We recommend this in all racing and high performance applications. They are for stock heads unless indicated, and work well in high heat and turbocharged applications.
Features:
- Manufactured from “Dead Soft†(solid) .043" thick copper material
- .051" embossment around each exhaust port to seal irregular surfaces. Total gasket thickness .094"
- Provides excellent sealing and durability
- Conforms to and seals minor surface irregularities
- For high performance street, drag race, oval track and turbocharged (extreme heat) applications
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1975 - 1976 | Pontiac | Grand LeMans | 400/6.6 V8 | |
| 1975 - 1976 | Pontiac | Grand LeMans | 350/5.7 V8 | |
| 1975 - 1976 | Pontiac | Grand LeMans | 455/7.5 V8 | |
| 1967 - 1976 | Pontiac | Grand Prix | 400/6.6 V8 | |
| 1976 | Pontiac | Grand Prix | 350/5.7 V8 | |
| 1971 - 1976 | Pontiac | Grand Prix | 455/7.5 V8 | |
| 1972 - 1975 | Pontiac | Grandville | 455/7.5 V8 | |
| 1968 - 1976 | Pontiac | LeMans | 400/6.6 V8 | |
| 1968 - 1976 | Pontiac | LeMans | 350/5.7 V8 | |
| 1971 - 1976 | Pontiac | Grand Safari | 400/6.6 V8 | |
| 1971 - 1976 | Pontiac | Grand Safari | 455/7.5 V8 | |
| 1973 - 1975 | Pontiac | Grandville | 400/6.6 V8 | |
| 1970 - 1976 | Pontiac | LeMans | 455/7.5 V8 | |
| 1972 - 1976 | Pontiac | Ventura | 350/5.7 V8 | |
| 1965 - 1970 | Pontiac | Bonneville | ||
| 1966 | Pontiac | Bonneville | 389/6.4 V8 | |
| 1967 - 1976 | Pontiac | Bonneville | 400/6.6 V8 | |
| 1967 | Pontiac | Bonneville | 428/7 V8 | |
| 1971 - 1976 | Pontiac | Bonneville | 455/7.5 V8 | |
| 1965 - 1969 | Pontiac | Catalina | ||
| 1967 - 1976 | Pontiac | Catalina | 400/6.6 V8 | |
| 1967 | Pontiac | Catalina | 428/7 V8 | |
| 1970 - 1976 | Pontiac | Catalina | 455/7.5 V8 | |
| 1970 - 1976 | Pontiac | Catalina | 350/5.7 V8 | |
| 1966 | Pontiac | Bonneville | 421/6.9 V8 | |
| 1967 - 1976 | Pontiac | Firebird | 400/6.6 V8 | |
| 1971 - 1976 | Pontiac | Firebird | 455/7.5 V8 | |
| 1968 - 1976 | Pontiac | Firebird | 350/5.7 V8 | |
| 1967 | Pontiac | Firebird | 326/5.3 V8 | |
| 1973 - 1975 | Pontiac | Grand Am | 400/6.6 V8 | |
| 1973 - 1975 | Pontiac | Grand Am | 350/5.7 V8 | |
| 1973 - 1975 | Pontiac | Grand Am | 455/7.5 V8 | |
| 1966 | Pontiac | Grand Prix | 421/6.9 V8 | |
| 1965 - 1970 | Pontiac | Grand Prix | ||
| 1968 - 1970 | Pontiac | Tempest | 400/6.6 V8 | |
| 1968 - 1970 | Pontiac | Executive | 400/6.6 V8 | |
| 1968 - 1969 | Pontiac | Executive | 428/7 V8 | |
| 1968 - 1970 | Pontiac | Tempest | 350/5.7 V8 | |
| 1970 | Pontiac | Executive | 455/7.5 V8 | |
| 1965 - 1970 | Pontiac | GTO | ||
| 1966 | Pontiac | Grand Prix | 389/6.4 V8 | |
| 1967 | Pontiac | Grand Prix | 428/7 V8 | |
| 1971 - 1973 | Pontiac | GTO | 400/6.6 V8 | |
| 1971 - 1973 | Pontiac | GTO | 455/7.5 V8 | |
| 1965 - 1967 | Pontiac | LeMans | 326/5.3 V8 | |
| 1971 | Pontiac | Grandville | ||
| 1966 | Pontiac | Star Chief | 421/6.9 V8 | |
| 1965 | Pontiac | Star Chief | ||
| 1966 | Pontiac | Star Chief | 389/6.4 V8 | |
| 1965 - 1967 | Pontiac | Tempest | 326/5.3 V8 | |
| 1967 | Pontiac | Executive |
Specs:
| Brand | Mr. Gasket |
|---|---|
| Collector Gaskets Included | No |
| Emission Code | 5 |
| Engine | Pontiac V8 |
| Gasket Line | Copper-Seal |
| Material | Copper |
| Port Shape | D-Port |
| Port Size | 1.55" x 1.94" |
| Product Type | Header Gaskets |
| Thickness | .094" |
| Warning | California Proposition 65 |
| Warranty | Limited 90 Day Warranty |
| Weight | 1 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 139 reviews
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Product Reviews
★★★★★ 5
Nice
Size: 16AWG Wiring Harness-2 Leads
Worked great, easy to install
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 8, 2026
★★★★★ 4
Wire length between the two connectors is short for a full-size pickup
Size: 16AWG Wiring Harness-2 Leads
I used the harness to wire ditch lights on opposite sides of a full-size pickup (F150). The wire between the 2 2-pin connectors was about 18 inches too short. Fortunately, splicing the wires from the (Nilight) ditch lights and the included pigtails gave barely enough length to reach the connectors. The connectors are buried inside the trim channel for the cowl; I'd have preferred they were exposed on each side to allow for easy swapping of the lights, but I can live with it. There is more than enough wire from the first connector to the relay for my all-under-hood installation, but I didn't think to measure if it would reach into the truck bed. The harness is of good quality and is a very good value. It would be a 5-star if it weren't for that little length issue.
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Reviewed in the United States on June 1, 2025
★★★★★ 5
great value
Size: 16AWG Wiring Harness-2 Leads
very affordable light install kit. worth the price just in the wiring connectors. I used this with my Nilight front bumper kit. i bypassed the button and wired high beam (+) to the yellow small wire. I did this so when the highbeams come on the light bar comes on. because with the stock arragement of this harness, the button continously draws power for the indicator LED
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Reviewed in the United States on April 30, 2026
★★★★★ 5
The Easiest!
Size: 16AWG Wiring Harness-2 Leads
This is one of the best and easiest wiring system to install that I have every used. And the price is great!
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Reviewed in the United States on June 11, 2025
★★★★★ 5
Well done. Useful.
Size: 16AWG Wiring Harness-2 Leads
Always well done.
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Reviewed in the United States on August 24, 2025