I could not use the LONG REACH in my Vintage (circa 2001), they just were not right but it depends on the engine they put in, I understand.
Bosch Super Spark Plugs
Standard Tip - 14mm Short Reach
W7AC - Recommended for T-1, 2 & 3 w/high compression, sustained high speeds, unleaded fuel, and fuel injection. A great plug for dual carbs.
W8AC - Fits all T-1, 2, & 3 applications requiring standard heat range.
Bosch Super Spark Plugs
Standard Tip - 14mm Long Reach
W7CC - Recommended for T-4, 914 Porsche, & Rabbit engines with Higher Compression, sustained high speeds, dual carbs, unleaded fuel, and fuel injection.
W8CC - Standard heat range plug for all stock T-4, 914 Porsche, & Rabbit.
Bosch Super Spark Plugs
Racing Tip - 14mm Short Reach
W7BC - The Competition Spark Plug, for use in high compression engines with dual carbs for fuel injection. The extended tip fires deep in the chamber for an improved burn of fuel mixture. The extended tip runs hotter at low RPM to help prevent fouling and is cooled by the flow of intake mixture at high RPM. This is the perfect racing plug.
W8BC - Designed for city stop and go traffic driving. The extended tip burns off carbon and other deposits before harmful build up can foul the electrode.
Bosch Super Spark Plugs
Racing Tip - 14mm Long Reach
W7DC - The racing plug for 914 Porsche, T-4, and High Performance Rabbits. This is the plug that brings home the winners. The extended tip helps burn the complete fuel mixture to increase horsepower and burn off carbon deposits. The extended tip runs cooler at high speed due to the cooling of the incoming fuel mixture.
W8DC - This is the plug for heavy stop and go traffic. The extended tip is designed to heat up fast and burn off deposits that build up in low RPM operation. The W8DC can be used for all types of driving and is the perfect plug for stock engines in normal operation.
Platinum Bosch Racing Plugs - 14mm
W8AP - The ultimate Racing Plug for 1600cc based engines requiring standard reach plugs. This is the hot one for extended RPM, dual carbs, high compression, and full range power (Short Reach)
WR7DP - The Platinum Plug for 914 Porsche, T-4, and Rabbit engines being used in high performance environments and driving. It will outperform and outlast conventional plugs. Go with the Platinum Racing Plug for the spark of your life (Long Reach)