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Classic Mini 1380 Street Engine & Transmission Complete

Classic Mini 1380 Street Engine & Transmission Complete

Classic Mini 1380 Street Engine & Transmission Complete
Selected: 1380_ENGINE
Classic Mini 1380 Street Engine & Transmission Complete
1380cc Street Model Engine
Big-Bore Power Unit Engines from MINI MANIA for the Classic Mini Cooper & Mini Cooper S

The "Ultimate Street Performance Engine" from Mini Mania is the result of 40+ years of building and racing our own Mini Coopers. Because drivability and reliability are of utmost importance in any Mini Cooper, only components from well-established suppliers are utilized to build our Mini motors.

While the standard configuration is described here, power-unit engines can be customized to meet the particular needs for your Mini Cooper. Just ask your friendly Mini Mania Sales Technician for a custom power-unit quote.

About The "Ultimate Street Performance Engine"

Engine blocks are cleaned, magnafluxed, bored and painted. The oil passages are thoroughly cleaned, removing and re-tapping all the factory "lead" plugs, and replacing with threaded hex plugs. The cylinder head is one of our large valve cast iron heads and has hardened valve seats for use with unleaded fuels. It has ample room to modify for very large valves. The casting has the valves further appart than any stock casting, making it ideal for big-bore applications. We use squeeze cast Powermax 73.5mm pistons, which are specifically designed for this application. Elgin supplies the custom ground camshaft, which is driven by a new timing chain and gears. Elgin Cams supplies the custom ground camshaft.

We sell these engines ready to bolt in and run, which means, of course, that they are already mated with transmissions. These late model rod change transmissions are also fully rebuilt with a 3.44 final drive (upgrade kits to install these in earlier model cars are available at a small added cost) or a remote shift box can be used (extra cost). Flywheel and clutch assemblies are all in place.

Horsepower testing has been done with the following options not included with this motor:

Note: No core charge and call us if you are interested in 'trading-in' you old engine!

Non-refundable $1,000 deposit required at time of order!


  • 73.5mm squeeze-cast pistons
  • 10:1 Compression
  • A+ Block, Crank, and Rods for best big bore reliability
  • Our CAM103 set at 108º for best horsepower
  • Large valve cast iron head  with A+ 'sintered' rocker arms
  • Latest Rod-change gearbox with A+ drop gears
  • Standard ratio 4-speed with your choice of final drive gears

And DON'T FORGET to ask about our WE SHIP IT - YOU SAVE Program.  Save money on shipping and the cost of your new engine!

Mini Mania Engine Comparison Tool - 1380 cc

Cast Iron Head      
Aluminum Head  
3.4 Differential
3.1 Differential        
3.2 Differential        
4 Speed  
5 Speed      
LCB Header    
Elec. Distributor    
Carb System    
Distributor Wires    
Duplex Timing Kit  
ARP Studs  


Interested in a 1275cc rebuilt Classic Mini engines and powerunits?  We have those too.

Mini Mania - where Classic Mini Rebuilt Engines are for Sale

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