Long Tube Headers for 68-76 AMC 290-401 V8 1-3/4in Primary Black Coated D103-B
Long Tube Headers for 68-76 AMC 290-401 V8 1-3/4in Primary Black Coated D103-B
Regular price
$750.10 USD
Regular price
Sale price
$750.10 USD
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Overview:
68-76 Various AMC Long Tube Black Ctd
Long tube headers provide the greatest increases in horsepower and torque across the entire RPM spectrum. The choice of racers worldwide, Doug's long tube headers are designed for the car owner who wants maximum power and the highest quality header on the market.
Features:
- 3/8" Thick machined flanges to prevent warping
- Precision formed long transition collectors and long tube design reduces backpressure and increases higher RPM horsepower
- Heavy duty 16-gauge tubing for long life
- Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating
Specs:
- Brand: Doug's Headers
- Collector Attachment: 3-Bolt Flange
- Collector Diameter: 3.0 IN
- Collector Port Diameter: 3.0 IN
- Color: Black
- Cylinder Head Port Shape: SAP
- Design: Full-length
- EGT Port: No
- Finish: Hi-Temp Black Coating
- Flange Thickness: 0.375 IN
- Gasket Or Seal Included: Yes
- Gaskets Included: Yes
- Grade Type: Performance
- Header Material: Steel
- Header Style: Full-length
- Material: Steel
- Mounting Hardware Included: Yes
- Oxygen Sensor Port: No
- Port Shape: SAP
- Primary Tube Outside Diameter: 1.75 IN
- Primary Tubing Diameter: 1.75 IN
- Prop 65 (C, R or CR): CR
- Prop 65 Yes/No: Yes
- Sheen Level: Matte
- Title: Doug's Long Tube Header 68-76 Various AMC 290-401 V8 1 3/4" Primary 3" Collector Black Hi Temp Coated D103-B
- Tube Wall Thickness: 16 GU
- Part Number: D103-B
Applications:
- 1968-1970 AMC Ambassador 390 CID
- 1970-1974 AMC Ambassador 304 CID
- 1970-1974 AMC Ambassador 360 CID
- 1971-1974 AMC Ambassador 401 CID
- 1979-1979 AMC Spirit 304 CID
- 1968-1970 AMC Javelin 390 CID
- 1968-1969 AMC Javelin 290 CID
- 1968-1969 AMC Javelin 343 CID
- 1970-1974 AMC Javelin 304 CID
- 1971-1974 AMC Javelin 401 CID
- 1968-1970 AMC AMX 390 CID
- 1968-1969 AMC AMX 290 CID
- 1968-1969 AMC AMX 343 CID
- 1970-1970 AMC AMX 360 CID
- 1972-1976 AMC Gremlin 304 CID
- 1970-1977 AMC Hornet 304 CID
- 1971-1974 AMC Hornet 360 CID
- 1971-1978 AMC Matador 360 CID
- 1971-1977 AMC Matador 304 CID
- 1971-1974 AMC Matador 401 CID
Emissions:
- This Product is LEGAL for Closed Course Competition use or Pre-Emissions Controlled Vehicles ONLY. It is Not Legal for use on any Emissions Controlled Vehicle for Street or Off Highway use.
Instructions:
Fitment Notes:
- AMC Motor Only with Dog leg exhaust port.
- 1968-69 cars require minor modification of passenger side shock tower if using 1970 and newer Tall Deck block. Clearance not an issue with original 68-69 block. (Not an issue on 1970 an later cars)

Policies and FAQs
Return Policy
We accept returns on products within 30 days of delivery. Return shipping is the responsibility of the buyer unless we, the seller, are at fault.
Fault reasons include but are not limited to:
Fault reasons include but are not limited to:
- Buyer was shipped the wrong product
- Buyer was shipped a damaged product
- The product page had incorrect fitment and the part does not fit the Buyer's vehicle
The Buyer will not be refunded outbound shipping unless the Seller (Car Part People) is at fault.
In cases where the Buyer purchases and ships the return please note that if the Shipper (ex. USPS, FedEx, UPS, etc.) loses the return we will not be able to offer a refund as the Buyer must contact the Shipper and make a claim.
All products must be returned in original condition, meaning that the product must not be damaged, installed, or missing pieces/parts. If the product is not in original condition a deduction will be issued of up to 50% of the purchase price of the product.
Opened boxes, plastic bags, and other packaging are not considered damage (excluding single use items such as, but not limited to, liquids, software, and other components that cannot be reused/resealed).
When we, the seller, are at fault, please Contact Us for a return label, products returned with a shipping label not provided by the seller will not be refunded to the buyer. Please also note that our return labels are issued with the dimensions and weight of the original shipment, if the product is being returned in any box/package besides the original please contact us with the dimensions and weight.
Returns must be sent to this address:
Car Part People
218 S Lyman St.
Wadsworth, OH 44281
Products returned directly to a manufacturer or the incorrect address may be issued a deduction or denied a refund entirely.
If a product was delivered outside the 30 day return window or is no longer in original condition please contact us as we may be able to issue a refund in store credit and/or with a deduction. If this is the case please Contact Us as these situations are handled on a case by case basis.
If there are any questions, concerns, or doubts about return eligibility please Contact Us and we would be more than happy to assist you.
This policy and page were last updated: July 14th 2023
FAQs
|Q. What is an Intermediate Brake Line?
|A. This is the line that runs from the front of the vehicle to the rear. On most vehicles it connects to a junction then you will have rear axle lines. On a few cars the intermediate lines will connect to the rear wheels. It is recommended to change the axle lines if you are replacing the intermediate lines.
|Q. What is included in a pre bent brake line kit?
|A. Our kits include all of the solid metal lines for that section of the vehicle
|Q. I need to return something - what's your return policy?
|A. We are happy to help! Please help us to help you by going to our return form and filling out the form as best as you can in order to request a return.
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Modern Day stands by our parts and is happy to accept returns within 30 days of purchase. Parts must be in new condition.
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If a part arrives damaged, or is defective, Please report it to us immediately. So we can handle it for your promptly.