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The 27/25mm JT-207 is the same head used on the Tillotson 212R but includes the spec 26lbs springs used in The Tillotson T4 225RS Spec Engines. The 225RS is an excellent bolt-on head that can support many mild cams, including the MOD2 and popular 265 lift cams, including our Banzai 265.
The 5mm stems help to reduce weight and friction between the valves and the guides while improving flow. The valves also use automotive-style split locks and retainers.
We highly recommend racers in The Tillotson T4 or T225RS Classes to keep a couple of extra cylinder heads available. Like the Briggs LO206, the valve seal is crucial for the engine to maintain spec performance. The rev limiting coil and noise reducing exhaust builds a lot of exhaust and cylinder head temperature that can cause the exhaust valve and seat to wear. The valve leak bleeds off the combustion and reduces power and performance.
Cylinder Head Assembly
- Intake Valve: 27mm
- Exhaust Valve 25mm
- Valve Stem 5mm
- Combustion Chamber 20.9cc
- Rocker Arm Assembly
- 26lbs Springs
- Pushrod Guide
- Retainers & Locks
Returns- Returns must be communicated by customers within 7 days of delivery and sent back within 30 days to receive a refund. No returns without authorization will be accepted. All returns must be accompanied by a copy of the receipt and a note. All items must be returned complete and in new condition.
All returns are subjected to 20% processing and restocking charge after the product has been inspected. The shipping cost will not be refunded.
Refunds will be made back to the same method of payment when ordering those parts. We will not refund a different method of payment.
Non-returnable Items Include- Close Outs and Clearance Items, Special Orders, Custom Orders, Used Parts, and Cut to Length Items. (Other items may apply)
Shipping: All orders are shipped UPS Ground, UPS Surepost or USPS Priority when ordering online. Shipping charges are calculated based on weight, size, and quantity of boxes in addition to processing and handling including insurance. All shipping charges are the customer's responsibility (even if charges online are not the same as emailed or phone orders).
All standard shipping orders will be shipped within a day or two on weekdays. Orders placed on the weekend (Fri-Sun) will be shipped Monday or Tuesday or the first weekday after a holiday. Custom or Handbuilt Products may require more time to be built before shipping. For any reason, an order may be delayed or prevented you will be contacted through phone and/or email.
Express/2nd Day/Next Day Shipments: Express orders must be made by phone orders only! Orders placed after 12:00 p.m. CST. will be processed the Next Business Day. UPS will only guarantee next day shipment. If you choose 2nd-day shipments expecting it before the weekend, UPS does not guarantee its arrival
Additional Fees: Double Check that the address you gave is correct. You may be charged additional fees to redirect your package to the correct address.
PO Boxes: We can ship to PO Boxes using USPS. However, UPS will only accept shipments to a valid street address. They do not deliver to P.O. Boxes.
International Shipping: International buyers are responsible for paying duties, taxes, and applicable customs brokerage fees separate from the merchandise cost. Buyers will generally pay these fees upon receipt of your shipment. Buyers may be charged additional fees once they receive the package. Read our international policy here.
Paypal: All orders paid by a verified PayPal account will be shipped to the address on the Paypal account to comply with Paypal's policy. No Exceptions.
UPS Estimated Shipping Lead Times
USPS Estimated Shipping Lead Times
