Madness MINI Cooper S High Performance Cylinder Head
Item Number: Madness High Performance Cylinder Head
* denotes required field
NOTE on the above charts. Other manufacturers claim higher flow numbers by flow testing their heads to .500 lift. This inflates flow numbers but is inaccurate because the Schrick cam never opens the valves this far. .400 is the maximum lift for the Schrick Cam.
Click to view of how our cylinder heads are flow tested
The stock MINI Cooper cylinder head suffers from poor airflow as a result of small intake and exhaust ports and a very rough interior surface. Our cylinder head features larger ported and polished intake and exhaust ports which improve airflow dramatically. Larger exhaust valves are also included for additional horsepower. We use 1.25mm larger Ferra Incanal exhaust valves. The MINI Cooper stock head uses this same high quality metal in its exhaust valves which is rare for a stock cylinder head; we use the same valves only larger. MINI's that regularly see track use will benefit from greatly from our larger intake valves. These valves make dramatic improvements at high rpm's and are only recommended for MINI Cooper's that see the rev limiter often during track use or racing.
A 10-15hp gain and more can be gained with the head work alone or gain additional horsepower with more modifications. This cylinder head takes the best from what we have learned from the Car and Driver Challenge and our sponsored racers in the field as well as everyday street driving and lapping days at the track.
Stage 1 Head:
- Removal of flash in the casting
- Hand-Lapped & vacuum-tested valve seats
- Bowl port & polish (behind valve seat)
- Degreased & cleaned
- Enlarge valve throat area
- Gasket match port & polish (Intake & Exhaust)
- Port enlargement
- Blueprinted valve springs (Shims Extra if needed or replace springs)
- CC Combustion cambers
- 1.25mm Ferra larger exhaust valves
- Decks milled & lapped
Stage 2 Head:
- Includes all of the above with the addition of 1.25mm Larger Ferra Intake Valves
Recommended addition's when purchasing cylinder head: Schrick Camshaft, ARP Head Stud conversion kit, Head Gasket, Intake Manifold Gasket, Exhaust Manifold Gasket
This product has a core charge of $799 (not included in the list price) is fully refundable when we receive your stock head in good condition.Shipping costs may be higher than estimated due to box dimensions, weight, and destination. This is a custom order product and therefore is not returnable or refundable.
10-15 Hp and very reliable
5/27/2013 10:56 AM
I got this installed almost two and a half years ago and I can say the reliability has been excellent! I used the base configuration with high flow fuel injectors (I already had a Schrick cam installed) and my before and after dyno tests showed a solid 10-15hp gain just as George stated.
The only downside to this is the cost vs. HP ratio...but at some point if you want to increase your HP you will need to go with way. Other than that this product is solid!