Yokolos LS Throttle Body Bypass Hose Kit — Stainless‑Braided Coolant Crossover, 1/4" Barb Fitting

Yokolos LS Throttle Body Bypass Hose Kit is a complete stainless-braided coolant crossover solution that lets you route engine coolant between LS-series throttle-body and intake steam ports on swaps and upgrades.

When installing or modifying GM LS engines (LS1, LSX, LM7, LR4, LQ4, LS6, L59, LQ9, LM4, L33 and similar), coolant plumbing around the throttle body and intake ports often needs a compact, durable bypass. This Yokolos kit provides a braided hose, detailed fittings and mounting hardware so you can create a leak-resistant crossover between coolant/steam ports during swaps or when adapting to non-stock radiators.

How does this kit connect to my LS engine and radiator?

The kit includes a stainless steel braided hose, a 1/4" hose barb fitting for radiator connection, two coolant ports, two bolts and o-rings so you can route coolant between throttle body steam ports and your radiator. Tapered pipe threads require pipe sealant or PTFE tape for a reliable seal.

• 1 stainless braided hose for flexible routing
• 1/4" hose barb fitting for radiator hose attachment
• Two machined coolant ports with o-rings and bolts for secure mounting
• Includes PTFE thread sealing tape to assist installation

What materials and durability can I expect from the Yokolos parts?

Fittings and ports are machined from heavy-duty cast steel with corrosion and oxidation resistance, while the hose uses stainless braiding for abrasion protection. The combination is designed for long-term service in automotive coolant systems under normal operating conditions.

• Cast steel ports resist impact and corrosion
• Stainless-braided hose protects the inner liner from wear
• O-rings provide initial sealing; threads require sealant for pressure reliability
• PTFE tape included to help prevent thread leaks

Which LS engines and swap scenarios does this crossover fit?

This crossover is made to work with the full range of GM LS-series engines, covering classic and later variants used in swaps or replacement installs. It’s especially useful when the stock coolant routing is altered or when using aftermarket radiators and adapters.

• Compatible with LS1, LSX, LM7, LR4, LQ4, LS6, L59, LQ9, LM4, L33 and similar
• Ideal for engine swaps where OEM brackets or lines are removed
• Works with aftermarket radiator setups via 1/4" barb fitting
• Useful for throttle-body and intake manifold coolant crossover needs

How do I install and maintain the kit for reliable performance?

Installation requires mounting the coolant ports to the intake or throttle-body steam ports, routing the braided hose to the radiator fitting, tightening bolts to spec, and applying pipe sealant to tapered threads. Periodically inspect hose ends, o-rings and fittings for leaks or wear and re-torque fasteners after initial heat cycles.

• Apply PTFE tape or pipe sealant to tapered threads before assembly
• Hand-start bolts and then torque evenly to avoid crushing o-rings
• Check connections after first heat cycle and at routine service intervals
• Replace o-rings if you notice seepage or degradation

Who is this for: The Yokolos LS Throttle Body Bypass Hose Kit is aimed at mechanics, DIY enthusiasts and professional shops performing LS-series engine swaps, throttle-body upgrades or radiator conversions. If you need a compact, robust crossover that adapts LS coolant ports to aftermarket radiators or non-standard plumbing layouts, this kit supplies the braided hose, fittings, sealing tape and hardware required to finish the job cleanly. If you have questions about fitment on a specific LS variant or need installation tips, Yokolos offers customer support to guide compatibility and best practices.