Stock '03-'04 GTX 4TEC S.C. Avg. Speed 62-63 mph @ 7500 RPM

Description of Parts RPM Top Speed
Sea-Doo GTX 4TEC Aquavein Grate
Part #: 113-95000
7500 63.5 mph
Sea-Doo GTX 4TEC 2.5 Degree Pump Wedge Kit
Part #: (2003) 143-95002   (2004) 143-95004
7550 64.5 mph
Sea-Doo GTX 4TEC S/C Filter Kit
Part #: 203-95003
7650 65.5 mph
R&D Sea-Doo GTX 4TEC Pump Cone Spacer Kit
Part #: 163-95200
7600 66 mph
R&D/Solas S/C 12/20 Impeller
Part #: 133-01220
7550 66-67.5 mph
R&D O.P.A.S Removal Kit
Part #: 123-95002
7550 67-67.5 mph
R&D GTX 4TEC Pro Crankcase Breather Kit
Part #: 203-00216
7550 67-67.5 mph
R&D GTX 4TEC Pro Series Sponson Kit
Part #: 123-95100
7550 67-67.5 mph
R&D GTX 4-TEC Auto Trim Kit
Part #: 163-95003
7650 67.5-68 mph



Parts/Kit Overview

The R&D Sea-Doo GTX 4Tec 185 H.P. Supercharged Stage 1 Kit was developed and tested to significantly increase top speed performance while eliminating impeller/pump cavitation that leads to the constant and annoying hitting of the RPM limiter in rough water conditions. The R&D GTX S.C. Stage 1 Kit delivers a great increase in handling and stability while boosting low and mid-range acceleration and adding a noticeable increase in top speed performance and stability! The cavitation and RPM limiter condition has been eliminated, which will lead to a higher degree of reliability. The R&D Stage 1 Kit is very easy to install and is available at a very reasonable price. Each part in the Stage 1 Kit can be used individually as a “stand alone” product. With the R&D Sea-Doo GTX 4Tec supercharged Stage 1 Kit you can expect to receive a noticeable performance gain, with great reliability, at a very reasonable cost. The R&D Sea-Doo GTX 4Tec Stage 1 Kit was developed for 2003 and 2004 GTX 4Tec models with the 185 H.P. engine.

  • The R&D GTX 4Tec Aquavein Intake Grate Kit will keep your Sea-Doo GTX’s pump loaded and hooked up to improve handling and top speed performance. Improved straight-line stability and smoother, tighter turning capabilities will be noticed instantly! Also, there is zero speed loss with the R&D Aquavein Grate. In fact, speed improvements in flat and rough water have been noted.

  • The R&D 2.5 degree pump reduction nozzle wedge kit was developed to wedge the reduction nozzle up 2.5 degrees on the Sea-Doo GTX supercharged models to reduce hunting or bow searching at top speeds. The R&D pump wedge kit will increase straight-line stability and will add a 1-1.5 mph top speed gain! The R&D 2.5 degree reduction nozzle wedge kit works excellent with the Sea-Doo GTX 2-position adjustable steering nozzle, allowing either a preferred 87.5 or 85 degree steering nozzle angle setting.

  • The R&D “supercharger” Filter Kit was designed and developed exclusively for the new Sea-Doo 4Tec 185 H.P. supercharged model. The R&D filter kit will unleash restricted horsepower trapped in the O.E.M. air filtration system and intake ducting. The new filter kit will sound good, look great, and will add 100 plus peak RPM’s to your tachometer reading, which will add 1-1.5 mph to your top speed performance.

  • The new R&D Pump Cone Spacer Kit is an inexpensive and creative way to extend the pump cones length, which will reduce engine rpm’s while adding additional pump thrust. Spacing the pump cone will add to top speed while keeping the engine rpm’s out of the rev limiter!

  • The new R&D/Solas 12/20 Impeller Option has a sleeker 4-blade design, with a superior high performing polished finish. Performance gains include reduced cavitation, increased acceleration and a 1-2 mph top speed improvement.

  • The R&D O.P.A.S. Removal Kit was developed for closed course, and off-shore competition to improve turning, rough water handling, and top speed.

  • The R&D Crankcase Breather Kit will add a high performance look to the RXP’s engine compartment. The R&D Crankcase Breather Kit eliminates power-robbing crankcase fumes from the engines main air intake. Cleaner mass air equals more power!

  • The new R&D GTX 4Tec Pro Series Sponson Kits main feature includes an ultra strong cast aluminum CNC machined backing plate, which is far superior over plastic backing plates with furniture inserts for threads! The R&D Sponson Kit offers 2-position sponson blade adjustability, which will guarantee this kit to out perform any other 1 up, 2 up, or 3 up. The R&D Pro Series Sponson Kit offers a smoother more predictable ride with much better low and high speed turning capabilities. Track tested and race proven!

  • The R&D GTX 4Tec Auto Trim Kit was developed to offer the GTX 4Tec models a necessary feature it does not have stock, a fully adjustable and fully automatic trim system. The R&D Auto Trim automatically tilts the steering nozzle to a rider preferred, adjustable 2-8 degrees. Drive from turn to turn with the trim automatically in the best position for perfect turn negotiation. The Auto Trim allows you to set the trim up your way to carve perfect turns every time. The R&D Auto Trim is a great feature for recreational and closed course riding. The Auto Trim system comes complete with a precision cast aluminum pro series steering nozzle, which is reshaped and resized to offer reduced cavitation through turns and adds 1 mph in top speed.

NOTE: The 2003 GTX 4Tec has a plastic pump/stator housing with a stainless steel pump support bracket. The 03 GTX 4Tec S.C. models will require the use of Part # 143-95002 2.5 degree wedge kit. The 2004 GTX 4Tec has an aluminum pump/stator housing, and will require Part # 143-95004 2.5 degree wedge kit.

NOTE: For extreme rough water or offshore racing conditions where the engine rpm’s are desired to be run lower to stay farther away from the O.E.M. rev limiter setting, R&D recommends the installation of the longer R&D Pump Cone Spacer Kit offered, which will keep the engine rpm’s at approximately 7500-7600, and peak speeds at approximately 67-67.5 mph. The longer of the two pump cone spacer kits offered by R&D is Part # 163-95350.

NOTE: The Sea-Doo GTX 4Tec supercharged performer kit development, tachometer, and top speed information posted was gathered after an initial 5-mile warm-up to stabilize engine temperatures. All testing was performed exclusively with Chevron 91 octane pump gasoline at 500 feet above sea level. Ambient air temperature during testing in May 2003 was between 90 and 110 degrees. These test results may change as we continue to gather data, and monitor O.E.M. stock boat speed averages, and production impeller consistencies. The information posted in the R&D Performer Kit is an average. In many cases we hear of feedback from Sea-Doo owners with performer kit packages reporting of higher speeds than posted.

  © 2004 R&D Performance Products USA. All Rights Reserved.