2004 Honda s2000

Pros
If you're looking to tune your engine to the ragged edge and extract the maximum horsepower possible, the TWM throttle body kit is a logical choice for power junkies. Propelling renowned import drag racer Jeremy Lookofsky and his all-motor Civic to a National Record of 9.33 seconds at 145.33 mph is living proof that ITBs are not to be taken lightly. The 2000 series TWM kits come with a high capacity -10 fuel rail, fuel pressure regulator and billet throttle body linkage. A built-in integral vacuum accumulator, an important piece for all vehicles using ITBs, helps maintain a cleaner and more efficient operation using the TWM kit. The kit is available to the consumer as a 50mm or 52mm kit, which can be ordered to use factory-type injectors or aftermarket Bosch-type units.

Cons
TWM representatives state that their throttle bodies are only suitable for race car applications since with any race car there is no provision for the heater connections or the IAC valve using the TWMs. Most of the parts sold by TWM Induction are designed, manufactured and sold for racing purposes only. This means that they should never be used on any vehicle originally equipped with emission controls on a public highway.

Parts
Intake Manifold

Tools
10-,12- and 14-combination wrench, 10-, 12- and 14mm socket, ratchet, extension, crescent wrench, screwdrivers, pliers, RVT silicone

Installation Time
Half A Day

Notes
The TWM throttle bodies sounded like nothing else in this world when the S2K finally fired up and made a pass on the dyno. The deep throaty roar that came was evident even when we made partial throttle runs in a mere attempt to dial in the AEM EMS fuel management before we finalized our final tuning and made a full pass. The rough tuning was an amazing improvement over our previous run as we gained 7 hp and 10 lb-ft of torque right off the bat at 3,600 rpm. An increase of 7 hp and 7 lb-ft of torque remained consistent from 4,800 to 5,300 rpm. Power figures once again rose from 5,800 rpm till redline as dynos revealed at 6,500 rpm a pickup of 7 hp and 6 lb-ft of torque with a consistent gain of 5 hp and 4 lb-ft of torque from 6,800 to 8,000 rpm. This was all accomplished with a simple plug and play of the AEM EMS and a rough tune before we dialed in the final programs.