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Engines and Components› Camshafts and Valvetrain
COMP Cams
Hi-Tech Roller Timing Set - Ford 351C-400M
SKU: C007 3121CPG
Advanced — 4+ hours
Overview
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Part #: 3121CPG
Cast Iron Camshaft Gear and induction hardened billet Steel crank sprocket. Feature 3 keyway crank sprocket for 4-degree incremental adjustability, 4-degree maximum advance/retard. Pre-stretched, heat-treated double Roller chain with heavy-duty large pin design
Featuring a cast iron cam gear and billet steel crank gear, this double roller Hi-Tech timing set for '70-'82 Ford 351C/M-400M is ideal for all street performance and race applications.
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Vehicle Symptoms
- Rattling noise from front of engine at idle
- Engine hesitation or loss of power during acceleration
- Check engine light illuminated with timing-related codes
- Rough idle or misfire that worsens with engine load
- Timing chain slap heard on cold start
Diagnostic Codes
- P0340 – Cam Pos Snsr A Ckt (B1 or Single Snsr)
- P0341 – Cam Pos Snsr A Ckt Range/Perf
- P0300 – Random or multiple cylinder misfire Det
Relevant Conversations
- Timing chain rattle on cold start – need replacement?
- COMP Cams 3121CPG timing set vs stock replacement
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- Engine misfire codes P0300 and P0340 – timing chain worn?
- How to install COMP Cams Hi-Tech roller timing set
- 1970 Chevy 350 timing set upgrade for cam swap
- Double roller timing chain noise normal or worn?
- Adjustable cam timing timing set for 4 degrees advance
- COMP Cams timing set vs Cloyes for street strip
- Symptoms of stretched timing chain on small block Chevy
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 | COMP Cams |
| Part Number | C007 3121CPG |
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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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