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  • WR Big Valve Heads.
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  • WR Aluminum Pushrods
  • The new WR Gland Nut requires no oil or grease. The mainshaft runs in a special Oilite bushing which improves mainshaft stability and eliminates grease transfer to the clutch disc.
  • WR Cylinder Head Studs
  • Lightweight Carrillo Rods and CP Pistons.
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  • WR Durbar Cylinders.
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  • WR Full Flow Filter Kit
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  • 1925S vs. 1925. Test done with stock exhaust.
75.00 LBS

Product Description

The NEW WR 1925S Engine Kit

Customers building our base 1925cc engines using WR91mm Durbar cylinders and lightweight CP pistons have been asking for a more aggressive S version of this smooth running big bore engine. The answer is the new WR 1925S. It uses the same WR Big Valve Heads and WR78 high lift camshaft of the popular WR2.2, but has the standard 74mm stroke and works well with the stock 356SC/912 counterweighted crank. This particular kit also uses special lightweight Carrillo rods with standard 53mm big ends but with a lightweight 19mm pin (a kit for standard Porsche rods is also available). The power band is smooth and pulls easily to the 6500 rpm redline. The kit is complete with all the critical parts you need. Everything is made to work together for a strong and reliable engine that requires no dialing in or adjusting.

Power output of the WR 1925S is shown in the attached graph compared to a standard 1925 with our WR Stock Heads and milder WR68 camshaft. Testing was done on our in house Superflow 902S dyno with a stock exhaust.


The kit includes all the parts listed below along with complete instructions:


  • WR 91mm/74mm Durabar Cylinders $1700.00
  • WR 91/74 Pistons with 19mm wrist-pins $1050.00
  • Special WR Carrillo Rods with 19mm wrist-pins $1200.00
  • WR Gland Nut $75.00
  • WR Head Studs $395.00
  • WR78 Camshaft (new billet) $350.00
  • WR Alloy Pushrods $175.00
  • WR Big Valve Cylinder heads with Manifolds $4800.00
  • WR Weber 44IDF Kit w/o manifolds $1455.00
  • WR Sport Air Filters (4" or 6") $550.00
  • WR Full Flow Oil Filter Kit $595.00
  • WR Electronic Distributor with 123 electronic internals.  It is preset with the 1.9 curve. $550


COMPLETE KIT $12,895.00

Also available for use with stock Porsche connecting rods.


If you're interested in purchasing the WR 1925S Engine Kit, please call 1-562-439-3333



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