The Lokar Throttle Cable for GM Tuned-Port Injection (1985–1991) & LT1 / LT4 (1992–1997) is a high-performance cable solution engineered specifically for classic GM fuel-injected V8 engines. Featuring a customizable "U-Cut-to-Fit" outer housing and inner wire, it allows engine builders and restorers to tailor the exact cable routing required when swapping or detailing TPI and Gen II LT V8 engines in street rods, muscle cars, or classic trucks.
Engine Application & Compatibility
This cable kit is designed to attach directly to factory and aftermarket throttle body linkage arms for:
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GM Tuned-Port Injection (TPI): 1985–1991 305ci (5.0L) and 350ci (5.7L) engines (Chevrolet Corvette C4, Camaro Z28 / IROC-Z, Pontiac Firebird Trans Am).
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GM Gen II LT1 / LT4: 1992–1997 350ci (5.7L) engines (Corvette C4, Camaro Z28, Firebird Trans Am, Impala SS, Caprice, Roadmaster).
Product Overview & Performance
Factory GM EFI throttle cables from the late 1980s and 1990s are often too long, too short, or visually bulky when these engines are swapped into earlier chassis (such as Tri-Five Chevys, C10 trucks, or early hot rods).
Lokar eliminates these issues by pairing a high-tensile stainless steel inner wire with a specially extruded PTFE (Teflon) liner. This low-friction internal sleeve prevents wire drag, rust, and binding under high engine-bay heat, delivering smooth, instant throttle response.
Housing & Finish Configurations
Lokar offers three distinct outer housing styles with color-matched hardware to complement your engine bay:
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Braided Stainless Steel: Features a high-shine stainless braid paired with natural brushed or polished aluminum fittings.
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Hi-Tech Black Stainless Steel: Features a sleek black braided stainless cover fitted with black anodized aluminum end hardware.
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Universal Black: Features a durable black polyethylene outer housing paired with clean aluminum fittings for an OEM-style finish.
Key Features & Design Highlights
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"U-Cut-To-Fit" Custom Sizing: Outer housing and inner wire trim easily to match custom firewall-to-throttle-body distances (available in 24", 36", and select 48" lengths).
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Engine-Specific Throttle Body Fitting: Cable end connects directly to GM TPI and LT1/LT4 throttle body cam linkages without slop or bind.
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Friction-Reducing PTFE Liner: High-density PTFE sleeve prevents internal wire wear and maintains smooth operation through tight bends.
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Fray-Eliminating Aluminum Ferrules: Precision aluminum ferrules clamp tightly over cut inner wire ends to prevent unraveling.
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Cotter-Free Clevis Design: Clean clevis attachment eliminates unsightly set screws and cotter pins.
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Universal Pedal Adaptability: Connects seamlessly to OEM factory gas pedals or Lokar aftermarket billet foot pedal assemblies.
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American-Made Quality: Hand-assembled in the USA and backed by Lokar's Lifetime Warranty.
Technical Specification Matrix
| Feature / Metric |
Technical Specification Detail |
| Manufacturer |
Lokar Performance Products |
| Engine Fitment |
1985–1991 GM TPI (305/350) & 1992–1997 GM LT1 / LT4 (5.7L) |
| Available Lengths |
24", 36", and 48" Cut-to-Fit Outer Housing |
| Housing Finish Options |
Stainless Steel Braid, Black Stainless Braid, Black Polyethylene |
| Fitting Finishes |
Brushed Aluminum, Polished Aluminum, or Black Anodized Aluminum |
| Inner Liner Material |
High-Density PTFE (Teflon) Sleeve |
| Inner Wire Material |
Stainless Steel Strand |
Installation & System Recommendations
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TPI / LT1 Bracket Alignment: Ensure the cable is secured using a dedicated TPI/LT1 throttle and kickdown cable mounting bracket at the intake manifold plenum to ensure linear pull against the throttle body cam.
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Automatic Transmission TV / Kickdown Cables: If running a GM 700R4 / 4L60 automatic transmission behind a TPI engine, Lokar manufactures matching Hi-Tech TV (Throttle Valve) cables that mount parallel to this throttle cable for proper shift geometry.
