PATENTED PERFORMANCE TECHNOLOGY!

US Patents Awarded! - Jett Engineering, Inc. 2004 *Increases HP 25% On The Average!! - See Below

Once again Jett Engineering leads the way in high performance engine technology! The TURBO-JETT IN-COWL muffler is a is compact, light weight assembly designed to achieve similar power enhancement to that of our standard Jett-Stream mufflers. Now aerobatic and scale pilots can enjoy that incredible Jett engine performance, and still keep the exhaust system neatly tucked away.

TURBO-JETT In-Cowl Mufflers are available in five sizes
4-6cc (.25-.36) $69.95, 6-9cc (.40-.60L) $79.95, 10-15cc (.61-.90) $89.95,
15-20cc (.91-1.20) $99.95 and 30cc (1.2-2.0) $119.95
Available for Jett and most other 2-cycle side exhaust engines

AVAILABLE NOW AT SPECIAL WEB DIRECT PRICES!
4-5cc only $55.00	6-9cc sizes only $60.00
10-15cc only $75.00	15-20cc only $85.00
30cc only $95.00	Need help? Call or Email
Adapters required for bolt-on flange engines $15.00 (YS, Rossi, older OS, etc)

Patent Awarded ! - Jett Engineering, Inc. 2004

Turbo-Jett Muffler Specifications
Muffler Size	Weight	Diameter	Length	Cowl Clearance Diameter **
5cc (25-36)	100g (3.5oz.)	2.75"	1.25"	5.25"
6.5cc (40-60L)	110g (3.8oz.)	2.75"	1.5"	6.2"
10cc (61-90L)	140g (5.0oz.)	3.25"	1.6"	6.5"
20cc (91-1.20)	160g (5.6oz.)	3.25"	2.0"	7.38"
30cc (1.20-2.00)	200g (7.0oz.)	3.50"	2.125"	7.75"
** This is the approximate minimum diameter of a round radial cowl which will enclose the muffler. This dimension will vary slightly depending on the engine used

Years of development and testing have really paid off and more is yet to come!

Shown installed on an OS .46, the new TURBO-JETT In-Cowl muffler showed impressive performance improvements over the stock OS muffler

Testing continues on a wide variety of engines. E-mail us for details on your application.

Turbo-Jett Muffler Weight Comparison
Muffler Fits Engine Size	Jett-Stream (Sport-Jett) Tuned Muffler	Stock OS Muffler	Turbo-Jett In-Cowl Muffler
5cc (25-36)	86 grams	86 grams	100 grams
6.5cc (40-60L)	128 grams	94 grams	110 grams
10cc (61-72)	178 grams	128 grams	140 grams
15cc (90L)	178 grams	174 grams (OS .91fx)	140 grams
20cc (91-1.20)	200 grams	---	160 grams
30cc	---	275 grams (OS 1.6)	200 grams

Turbo-Jett In-Cowl Muffler Test Data - Sport Jett .46
Prop Size (APC)	Stock OS Muffler	Jett-Stream Muffler*	Turbo-Jett In-Cowl
10 x 6	14,700 RPM	16,700	15,800
11 x 6	---	---	14,200
11 x 8	Sport-Jett .46 not tested on larger prop due to high exhaust timing

Turbo-Jett In-Cowl Muffler Test Data - OS .46
Prop Size (APC)	Stock OS Muffler	Jett-Stream Muffler*	Turbo-Jett In-Cowl
10 x 6	14,200 RPM	15,900	15,400
11 x 6	12,200 RPM	---	13,300
11 x 8	10,300 RPM	---	11,700

Turbo-Jett In-Cowl Muffler Test Data - GMS .40
Prop Size (APC)	Stock GMS Muffler	Jett-Stream Muffler*	Turbo-Jett In-Cowl
10 x 6	13,100 RPM	---	14,200
11 x 6	11,000 RPM	---	11,900
11 x 8	9,400 RPM	---	10,500

Turbo-Jett In-Cowl Muffler Test Data - OS .91FX
Prop Size (APC)	Stock OS Muffler	Jett-Stream Muffler*	Turbo-Jett In-Cowl
12 x 6	13,100 RPM	14,300	13,600
13 x 6	11,600 RPM	12,700	12,300
14 x 6	10,700 RPM	11,600	11,500
15 x 8	9,100 RPM	10,000	9,600

Turbo-Jett In-Cowl Muffler Test Data - OS 1.60 using 5% PowerMaster
Prop Size (APC)	Stock OS Muffler	Jett-Stream Muffler*	Turbo-Jett In-Cowl
16 x 8	9,600 RPM	---	9,800
18 x 10	7,550 RPM	---	8,000
20 x 8	7,250 RPM	---	7,800

Our famous JETT-STREAM Tuned Mufflers are currently available
for selected engines, .25-1.20 sizes.
*Jett-Stream Mufflers are the standard mufflers sold with our Sport-Jett engines.

Jett 1.20/Turbo-Jett powered Ultra-Stick Muffler rotated "up" - mounts in either direction (see our Hall of Fame section for more details)	Turbo-Jett shown installed on a ST 2300 In-Cowl muffler showed awesome performance *Notice the Jett carb?? Click here to learn more!
	Sometimes testing a variety of RPM ranges requires a little bit of ingenuity. And a little extra hearing protection never hurts! OS 1.60 with Turbo-Jett on the test stand shown left
	OS 160 and Turbo-Jett installation up front of a Giles. This installation features a perry pump as well. "My OS 160 can now handle the APC 18 x 8W at 9300 to 9450 using the same FIA fuel!"
Hangar 9 Corsair Jett 90L and Turbo-Jett powered	Dave Patrick .40 size Ultimate OS .46 with Turbo-Jett 11.5 x 4 prop
Aeroworks .40 size Edge 540	Jett BSE-76L and Turbo-Jett 14x4W prop
Great Planes Shoestring "I installed your Turbo systems on my Shoestring with OS 61 FX. The OS 61 FX turn up 12900 RPM using an APC 11 x 7 with 15%. Also, my old Ugly Stick with a MVVS 91 using a APC 13 x 8 can turn up 12600 RPM using 15% fuel and has added new life to a old engine and aircraft. Both engines have shown a 10-15% increase in power along with meeting the AMA current noise standards."	AeroWorks 60-90 Edge 540T Jett BSE 100L with Turbo-Jett
VQ P-51D Mustang Jett SJ-46 and Turbo-Jett 12 x 4 prop shown	Jett SJ-46 and Turbo-Jett installation. Note the remote needle valve installation !!

Any comments or questions?
Send your email to jett2006 @ jettengineering.com