Flowtech
HDR CRMC 65-74 OLDS 400-455
SKU: F00M 31154FLT
Description
Part #: 31154FLT
Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 5/16 in. flanges with sealing rings for a leak-free seal. All mounting hardware and gaskets are included for a simple installation. This header is coated in a high heat and corrosion resistant metallic ceramic thermal coating that increases exhaust velocity and reduces underhood temps for increased performance.
Features:
- Fuel Economy From The Engine
- Fuel Economy From The Engine
- Leak Test For Max Performance
- Leak Test For Max Performance
- Ceramic Headers
- Ceramic Headers
- Rust And Corrosion Resistance
- Rust And Corrosion Resistance
- Mandrel-Formed Power Plenum
- Mandrel-Formed Power Plenum
- Leak-proof O-Ringed Port Seals
- Leakproof O-Ringed Port Seals
- Include All Mounting Hardware
- Include All Mounting Hardware
1965-1974 Oldsmobile Cutlass/442, 71-74 Delta 88: 400-455ci Standard Headers Primary Tube Collector Size 1.75 in. x 3 in.
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | Flowtech |
| Part Number | F00M 31154FLT |
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Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
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