Warranty and returns policy

We do not accept returns or give refunds for parts that don't fit. The one exception: if the Japanese specifications we posted for an item were wrong, we will consider an exchange, return or refund.

Full details are in our Return & Refund Policy.

• Shipping and freight charges are non-refundable.
• You can pick up your order at our San Jose warehouse instead of paying for freight.
• Check the outside of the packaging before you sign the delivery receipt, and write any damage on it. Signing a clean receipt releases the freight company from responsibility.
• Shipping insurance is provided by the freight company, not by Southbay JDM, and we are not responsible for damage caused by rough handling in transit.
• Every engine passes a multi-point inspection and a compression test. We only ship engines with good compression results.

Coverage starts on the date of sale. The warranty shown on each listing applies to that item.

The limited warranty covers these internal engine parts:

• Pistons, rings and pins
• Crankshaft and main bearings
• Connecting rods and rod bearings
• Camshaft and cam bearings
• Timing chain and gears
• Valves, valve springs, seals and guides
• Oil pump
• Pushrods, rocker arms and shafts

We also warrant that the engine block, cylinder walls and cylinder head are free of cracks and distortion.

If a covered part fails, we decide whether to repair the engine with rebuilt or serviceable used parts or to exchange it.

External and bolt-on parts are not covered, including:

• Intake and exhaust manifolds, carburetors and distributor
• Starter, sensors and other electronic parts, and emission devices
• Flywheel, clutch and pressure plate
• Water pump, thermostat, belts and hoses
• Oil pan and valve cover
• Transmissions, drive shafts, half shafts and engine mounts

• Labor to remove or install a repaired or exchanged engine
• Towing, freight or delivery charges
• Damage caused by abuse, neglect, an accident or natural events
• Loss caused by improper installation
• Overheating damage, including oil leaks and blown head gaskets, or damage from poor coolant circulation, a clogged radiator, a stuck thermostat or a faulty water pump
• Gradual loss of performance from normal wear, unless a part actually breaks
• Modifications or uses the engine wasn't built for, such as a turbo, supercharger, nitrous or an aftermarket-tuned ECU
• Racing or competitive driving
• Failure of parts this warranty doesn't cover
• Tune-ups, adjustments, filters, hoses, belts, lubricants, coolant, spark plugs and other maintenance items
• Deterioration or pre-ignition (detonation) damage
• Repairs made without our prior authorization
• Damage from a defective timing belt (install a new one)

• A repair or exchange does not restart or extend the warranty period.
• This limited warranty replaces all other express warranties. Any implied warranty is limited to the length of this warranty, and we take on no other obligation or liability.
• We are not responsible for incidental or consequential damages, such as loss of use, lost time, inconvenience or commercial loss.

1. Call or email us to open a claim. Have your order number ready.
2. Ship the engine back to us at your cost. We send a replacement only after we have inspected the returned engine and confirmed the problem.
3. If the engine is defective, we refund your return freight and send a replacement. If it isn't, you pay the shipping both ways to get it back.
4. Return the engine in the same condition we sent it. Any missing parts are charged to you.
5. If we ship a replacement first, the original must reach us within 60 days or you will be charged the full price of the engine plus freight.

Skipping any of these voids the warranty:

• A certified mechanic installs, maintains and adjusts the engine.
• Ignition timing is set to the manufacturer's specification.
• The oil is changed after the first 3,000 miles.
• Cylinder head bolts are re-torqued to the manufacturer's specification.
• The cooling system is checked, serviced if it is rusty or contaminated with oil, and refilled with new coolant.
• The timing belt, oil filter, water pump and spark plugs are replaced.

• An engine shipped with accessories may not meet state or federal emissions rules. Move the emission devices from your old engine to the replacement to stay compliant.
• Add-on parts attached to an engine are there for testing only and come free of charge.
• The price covers the long block only: the cylinder head and short block.

• All sales are final. No refunds or exchanges, except as described in this policy and our Return & Refund Policy.
• Deposits are non-refundable.
• You can cancel an order until it ships. Cancelled orders paid by check have a $25.00 fee.
• Refused or returned orders are charged a 20% restocking fee on the invoice amount, plus all freight to bring the item back to our warehouse.

• Our used engines have between about 20,000 and 60,000 miles, depending on the model year. They are not new.
• Expect minor scratches and other marks from normal use.
• Fragile plastic, metal or rubber pieces can bend or break in transit. These can be swapped from your original engine or bought at a local used-parts store.