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Highlights of B18C Spec R compared to standard B18C SIR:
Camshaft - Wide-angled, high-lift, high-durability camshaft.
Exhaust Valve Spring - High-lift, dual-layered spring.
Spark plug - High-heat-type #7 platinum plug.
Crankshaft - Full-counterweight, 8-weight, high-output, custom crankshaft.
Connecting Rod - Custom TypeR rod, high-durability, lightened.
Pistons - High-compression, low-friction, custom pistons.
Inlet Valves - Lightened inlet valves.
Intake Manifold - Custom tuning, single-port type.
Throttle Body - 62 mm (2.4 in) wide-mouth throttle body.
Inlet Valve Springs - High-lift, flat-surfaced, dual-layered spring
Port Buffing done by hand
Fastening of Connecting Rod done with micrometer.
98spec engine has stainless steel 4-1 exhaust manifold |
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