FORD C9ZZ9B459C Nos Smog Hose Cj Thermactor Anti Backfire Valve Inlet

( Manufacturer Part Number: C9ZZ9B459C ), ( Part Type: Valve Hose ), ( Oe/oem Part Number: C9ze9459a ), ( Vintage Part: Yes ), ( Universal Fitment: Direct Replacement ), ( Finish: Rubber ), ( Rare Mint Boss 429ho Thermactor Muffler Valve Inlet Hose Mustang: Rare Mint Boss 429ho Thermactor Muffler Valve Inlet Hose Mustang ), ( Country Of Origin: United States ), ( California Prop 65 Warning: 63 64 65 66 67 68 69 70 289 302 351 Cleveland Windsor 390 Gt 410 427 428 429 Boss Cj Cobra Jet Ford Lincoln Mercury Accessory Cobra Comet Continental Cougar Custom Cyclone Fairlane Falcon Galaxy Marauder Montclair Montego Monterey Mustang Mach 1 Ranchero Shelby Thunderbird Torino Autolite Fomoco Motorcraft Rotunda Air Cleaner Fuel Oil Filter Air Conditioning C4 C6 Manual Battery Brake Rotor Camshaft Carburetor Clock Clutch Console Crankshaft Cruise Speed Control Decor Disc Brake Distributor Drive Belt Exhaust Intake Manifold Gauge Heater Hood Scoop Lamp Mirror Molding Trim Muffler Ornament Power Steering Pulley Radiator Cap Hose Rear Axle Shifter Knob Shock Absorber Sign Display Spark Plug Wire Speedometer Steering Wheel Tachometer Tail Head Light Toploader 4-speed Turn Signal Trunk Wheel )

Review FORD Nos Smog Hose Cj ho Thermactor Anti backfire Valve Inlet fits MUSTANG BOSS HO 429

The **Ford C9ZZ9B459C NOS Smog Hose for Mustang Boss 429 / CJ-HO Thermactor Anti-Backfire Valve Inlet** is a meticulously crafted, high-performance replacement part designed specifically for Ford s legendary high-output (HO) engines, including the iconic Boss 302 and Boss 429 configurations, as well as the CJ-HO (Cleaner Jetronic High Output) applications. This aftermarket hose is engineered to replicate the original equipment manufacturer (OEM) specifications with precision, ensuring a seamless fit and optimal functionality within the Thermactor emissions control system. Constructed from durable, heat-resistant synthetic rubber, this hose is built to withstand the demanding conditions of high-performance engines, including the intense heat and pressure fluctuations generated by the aggressive combustion cycles of NOS (Nitrous Oxide) applications. The Thermactor system, originally introduced in the late 1960s and early 1970s, was designed to suppress backfires and reduce emissions by diverting exhaust gases into the intake manifold during certain engine conditions, and this hose plays a critical role in maintaining the integrity of that system. The C9ZZ9B459C part number ensures compatibility with the specific inlet port of the anti-backfire valve, allowing for proper routing of exhaust gases while minimizing leaks and maintaining vacuum integrity. Whether you're restoring a classic Mustang, preparing a CJ-HO for high-performance use, or simply upgrading an older vehicle s emissions components, this NOS smog hose is an essential upgrade that combines historical accuracy with modern reliability. Its clean, unobtrusive design ensures it blends seamlessly into the engine bay, while its robust construction guarantees long-term durability, even under the stress of nitrous-enhanced power delivery. For enthusiasts seeking both authenticity and performance, this replacement hose is an indispensable component for maintaining the integrity of the Thermactor system in Ford s most legendary muscle cars.

### Pros and Cons of Buying a Ford C9ZZ9B459C NOS Smog Hose, Mustang Boss 429 CJ-HO Thermactor Anti-Backfire Valve Inlet

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1. **Rarity and Collectibility** The Boss 429 is one of Ford s most iconic muscle cars, especially in its original form. A NOS (New Old Stock) example with original components like the smog hose and Thermactor anti-backfire valve is highly sought after by collectors and enthusiasts. Its scarcity increases its value over time.

2. **Historical Significance** The Boss 302 and Boss 429 were groundbreaking in the muscle car era, blending high-performance engines with race-proven technology. Owning a genuine NOS example connects you to automotive history.

3. **Originality and Authenticity** A fully original Boss 429 with NOS parts retains the exact specifications and materials from the factory, including the CJ-HO (Cleveland High Output) engine, which is one of the most powerful and reliable big-block Ford engines ever produced. This level of authenticity is rare and often preferred by purists.

4. **Potential for High Resale Value** Well-preserved NOS examples can appreciate significantly, especially if they remain in excellent condition. The Boss 429 is a classic that continues to hold value in the collector market.

5. **Engine and Performance Legacy** The CJ-HO engine is renowned for its durability and power output (425 hp in its original form). Restoring or maintaining it allows you to experience a piece of automotive engineering that was ahead of its time.

6. **Customization Potential** While the car is original, many owners choose to restore or modify it while preserving its core authenticity. The Boss 429 platform allows for a balance between classic styling and modern upgrades (e.g., suspension, electronics, or interior comforts).

7. **Community and Enthusiast Appeal** Owning a Boss 429 grants access to a passionate community of owners who share knowledge, restoration tips, and event participation (e.g., car shows, drag races, or concours competitions).

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1. **High Cost** A NOS Boss 429 with original components like the smog hose and Thermactor valve is extremely expensive. Prices for well-documented examples can range from **$200,000 to over $1 million**, depending on condition, provenance, and rarity. This is a significant financial commitment.

2. **Maintenance and Restoration Expenses** Even if the car is NOS, it may require extensive restoration work to bring it to showroom condition. The CJ-HO engine, while durable, can develop issues over decades (e.g., rod bearings, valve train wear, or fuel system problems). Restoration costs can easily exceed **$50,000 $100,000 **, depending on the scope of work.

3. **Storage and Insurance Costs** High-value classics require secure storage (garage, climate-controlled facility) and specialized insurance, which can add **$2,000 $10,000 annually** to ownership costs.

4. **Limited Practicality** The Boss 429 is a heavy, V8-powered muscle car designed for drag strips and highways, not daily driving. Its size, fuel efficiency (around 10 12 MPG), and maintenance needs make it impractical for everyday use. Many owners keep it as a weekend or special-occasion project car.

5. **Market Volatility** While classics like the Boss 429 tend to appreciate, the market can be unpredictable. Economic downturns, shifts in collector preferences, or oversaturation of similar models could impact resale value.

6. **Time-Consuming Ownership** Restoring, maintaining, or even driving a Boss 429 requires significant time and effort. The car may need frequent attention to keep it running smoothly, and finding qualified mechanics familiar with the CJ-HO engine can be challenging.

7. **Ethical and Environmental Concerns** Older vehicles like the Boss 429 were not built with modern emissions or safety standards in mind. Driving one today may require modifications to meet contemporary regulations, and its environmental impact (fuel consumption, exhaust emissions) is higher than modern alternatives.

8. **Risk of Counterfeit or Misrepresented Parts** The NOS market is notorious for fraud. Without thorough documentation (e.g., original Ford records, serial numbers, or third-party authentication), there s a risk of purchasing a car with "restored" or swapped parts labeled as original.

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Buying a NOS Ford Boss 429 with original smog hose and Thermactor components is a dream for automotive enthusiasts who prioritize rarity, history, and authenticity. It offers unmatched prestige, collectible value, and the chance to own a piece of muscle car legend. However, the financial burden, practical limitations, and maintenance demands make it a **high-risk, high-reward** investment. It is best suited for those with deep pockets, patience, and a passion for preservation rather than casual driving.

---

- Proceed with caution. Ensure the car has **full documentation** (e.g., original Ford records, serial numbers matching NOS parts, and a clean title history).

- Budget for **at least $250,000 $500,000** to account for purchase, restoration, storage, and insurance.

- Join the Boss 429 community (e.g., forums like *Boss 302/429 Club*, *ClassicCars.com*) to verify the car s authenticity and gather advice.

- Consider starting with a **restored but documented** example if a true NOS car is beyond your budget this balances authenticity with practicality.

- Explore **replica or modern interpretations** of the Boss 429 (e.g., Ford s SVT Mustang or aftermarket builds) that offer similar styling and performance without the NOS price tag.

- Look for **project cars** that need restoration but are priced lower, allowing you to invest in a build over time.

- Begin with a **more accessible classic** (e.g., Mustang GT, Camaro Z28) to learn the ropes of restoration, maintenance, and ownership before committing to a Boss 429.

- Attend **auctions (RM Sotheby s, Barrett-Jackson)** with a clear budget and expert guidance to avoid overpaying.

Ultimately, a NOS Boss 429 is a **lifetime commitment** financially, emotionally, and temporally. It is not an investment for the faint of heart but a passion project for those who live and breathe muscle cars. If you re prepared for the challenges, it can be one of the most rewarding purchases you ll ever make. If not, consider alternatives that align better with your lifestyle and budget.

Details:

Ford literature alludes to similarly equipped Cougars, one of which a '69 was definitely built. FoMoCo Ford Fred Frodo Aussie Australia Autolite GOTH GTHO GTOH Parse Phase Atilt Elite Utility Auto lire Auto lie Motorcraft 1960 1961 1962 1963 1964 1/2 1965 1966 1967 1968 1969 1970 1971 1972 1973 custom faille farina fairlan fallen farina far lane galaxies Galaxy Glaxo Galaxy falco falcon XR XS XT XW XA XB XC ranees rancher Toni torin trio torn Toni trio tallied 300 500 XL 500xl formal squire sun liner country ranch wagon Victoria Mercury cougar XR7 XR-7 GTE eliminator eliminate comet Comte comet cyclone cyclon cyclone Lincoln marquis meteor meter metre meteor mimetic monocular Montcalm monocular monterey monetary Monterey S22 S55 montego mintage Monte monger montage spoiler Tonga twink brougham colony park lane commuter runabout Shelby Cobra Cobr Cobra Jet mud sang Mustang gt-350 GT350 gt-500 GT500 Boss BS's basso Boss 230 249 32 320 302 315 350 429 492 428 super grandee mach I 1 one villager cabriolet convertible coupe fastback filter hardtop rag top sedan sports roof station Frontenac Lemony Marquis Monarch Montcalm Niagara Ride air auto badge battery belt bezel block body brakes cap carburetor chassis choke cleaner console cooling cover cylinder decor defroster deluxe distributor door emblem exhaust fender fuel gauges glass grille Hood intake knob handle harness hinge Hose ignition interior key latch light linkage lens lock mags manifold moulding ornament panel pony power pump radiator radio rod seat sender shifter snorkel spare speedo steering stereo suspension tachometer tank tail tires tyranny transmission trim trunk upholstery valve wheel window wipers wiring. Either way, you can't go wrong by choosing NOS parts. NOS Ford Thermactor Hose.

For more great parts, literature memorabilia. Another obsolete Lunch Pail part. Why put up with a damaged part when you can have the real deal, brand new?, Is your cars restoration for personal pride or hunt show-points. Its exactly the same part installed at Assembly, in truly mint condition.

Details like this separate the BEST from Rest. A super rare piece I've been saving for years !, Original equipment 1969 - 70 'Boss 429' Mustangs. Don't miss out.

part #: c9zz9b459c price

• $3000.00

specifications emissyste:

• for models: Ho, 429, Mustang, Boss
• for makes: Ford
• mpn: C9zz9b459c
• part type: Valve Hose
• oe/oem part number: C9ze9459a
• vintage part: Yes
• universal fitment: Direct Replacement
• finish: Rubber
• rare mint boss 429ho thermactor muffler valve inlet hose mustang: Rare Mint Boss 429ho Thermactor Muffler Valve Inlet Hose Mustang
• country of origin: United States
• california prop 65 warning: 63 64 65 66 67 68 69 70 289 302 351 Cleveland Windsor 390 Gt 410 427 428 429 Boss Cj Cobra Jet Ford Lincoln Mercury Accessory Cobra Comet Continental Cougar Custom Cyclone Fairlane Falcon Galaxy Marauder Montclair Montego Monterey Mustang Mach 1 Ranchero Shelby Thunderbird Torino Autolite Fomoco Motorcraft Rotunda Air Cleaner Fuel Oil Filter Air Conditioning C4 C6 Manual Battery Brake Rotor Camshaft Carburetor Clock Clutch Console Crankshaft Cruise Speed Control Decor Disc Brake Distributor Drive Belt Exhaust Intake Manifold Gauge Heater Hood Scoop Lamp Mirror Molding Trim Muffler Ornament Power Steering Pulley Radiator Cap Hose Rear Axle Shifter Knob Shock Absorber Sign Display Spark Plug Wire Speedometer Steering Wheel Tachometer Tail Head Light Toploader 4-speed Turn Signal Trunk Wheel

payments emissyste:

• other
• wallet: Apple-pay
• credit card: Diners-club

seller emissyste:

• city: Islesboro, Maine
• rating: 100.0%
• # reviews: 5391

returns emissyste:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

general emissyste:

• condition: For parts or not working
• Car Truck Parts Accessories > Exhaust Emission Systems > Other Exhaust Emission Parts

offer emissyste:

• options: Ship-to-home
• started: April 5, 2026
• best offers: True
• availability: In Stock
• sold: 0
• quantity: 1

shipping emissyste:

• carrier: USPS, FedEx, UPS
• transit: 4-10 Days
• type: Fixed
• service: USPS Priority Mail, USPS Priority Mail Express, FedEx Standard Overnight, UPS Next Day Air
• class: Expedited, One-day
• cost: $0.00

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