Slowboy is a direct distributor of Cosworth and we've got great products available right now at excellent prices! check it out!

1. 4B11 Stroker Kits!!!!

Cosworth stroker kits are the perfect way to add displacement, torque and power to your engine. Each kit includes select matched components from our parts list ensuring reliable performance.
Mitsubishi 4B11 (Evolution X) 2.2L

• Cosworth Forged Pistons (86mm)
• Cosworth Fully Counterweighted Billet Crankshaft (94mm)
• Cosworth Forged Connecting Rods
• Cosworth Piston Rings

2. 4B11 Forged Pistons!

Cosworth pistons really take forged technology to the next level. Cosworth high performance forged pistons are designed and engineered to withstand this type of punishment and still perform. All Cosworth pistons are manufactured using the same methods as our Formula One pistons and include features such anti scuff skirt coating, ultra-strong pins, polished top and patented antidetonation bands. We have various bore sizes available!!!

Key Features

• Unique forgings for each application
• ‘Xylan’ anti scuff skirt coating
• Polished tops (reduces carbon build up and relieves stress)
• Manufactured from proprietary alloy (CosAl 010)
• Ultra strong pin
• Patented anti-detonation bands

3. 4B11 Head Gaskets!

Cosworth High Performance Head Gaskets are engineered to seal in power under the most demanding conditions. Constructed from stainless steel with a folded stopper layer, each application features superior sealing compared to conventional multi layer steel gaskets. Additionally, Cosworth High Performance Head Gaskets are manufactured from pre-coated die cut stainless steel resulting in uniform coating distribution and consistent shape.
Key Features

• Individual die cut layers of stainless steel with superior consistency compared to laser cut gaskets
• Pre-coated stainless steel with a 0.25 micron layer of nitrile rubber ensures consistent distribution of coating with no high or low areas
• Manufacturing dimensional tolerance of +/- 0.001”
• Die cut manufacturing process ensures smooth edges, unlike laser cut gaskets
• Cosworth gaskets feature a “folded stopper” layer for additional torque around each cylinder. The width of sealing area is specific for each application thereby providing ultimate sealing properties
• Available in a range of thicknesses for specific applications

4. Head Stud Kit

Essential for high performance engine builds, heavy duty head studs reduce cylinder head movement in high boost or high compression engines optimizing cylinder head to block sealing. Cosworth Ultra High Performance Head Studs are manufactured from H11 tool steel with 260,000psi tensile strength and come complete with nuts and washers. Manufactured with hex broach end for ease of installation. Additionally, genuine Cosworth head studs utilize a base seating feature to evenly distribute maximum load on the stud and not the threads. This feature is typically found only in high level race engines.

Hit the PM button and put Hey Marti in the subject and I'll get you some EXCELLENT PRICING. If you email me at mar@slowboyracing.com with your full name, i can send you back a complete estimate for you to look at.