Here are a few of the mods available for Beech aircraft.
Prices shown are estimated- many do not include installation.
AIRCRAFT MOD COMPANY REMARKS EST. COST

Bonanzas

Windshield &
side glass.

Beryl
D'Shannon

One piece"SpeedSlope" windshield,
HD glass all around.

$1,200-
and up

Bonanzas

Tail Mod

Smith Speed
Conversion

Stub spar tail
reinforcement

$2,375

Bonanzas

Gap seals

Smith Speed
Conversion

Higher speed, lower stall,
increased ROC, better roll.

$1,390

Model 33,
35 & 36

Vortex
Generators

Micro Aero-
Dynamics

Reduced stall speed
& Vmc,lower drag.

$1,450

Most
Models

"Starfire"
Conversion

Colemill
Enterprises

New IO-550's (300HP),
4-blade Q-tip props.

$46,900

Model 33's

Speedbrakes
(electric)

Precise
Flight Inc.

Increases rate of descent without
airspeed buildup or shock-cooling.

$3,995
(kit)

Model 33
thru G33

Engine
Conversion

Beryl
D'Shannon

TCM lO-550-B (300hp)
& 3-blade prop.

$28,000-
$35,000

C33A, E33A,
E33C,F33A/C

Engine
Conversion

Beryl
D'Shannon

TCM lO-550-B (300hp)
& 3-blade prop.

$22,000-
$32,000

C 33A,
E 33A - C

Tip Tanks

Beryl
D'Shannon

Includes 15 Gal. tanks. GWT
increase on most models.

$4,500-
$5,750

Model 33's
& 35's

Speed Mods

Smith Speed
Conversion

Reduces parasite drag, adds
speed, lowers fuel consumption

$14,900

V tailed
Bonanza

Tail Mod

Smith Speed
Conversion

Stablizer attach fitting &
ruddervator balance

$24,900

A35 - G35

Engine
Conversion

Beryl
D'Shannon

lO-550-B (300hp)
& 3-blade prop.

$50,000

Model 35's

Speedbrakes
(electric)

Precise
Flight Inc.

Increases rate of descent without
airspeed buildup or shock-cooling.

$3,995
(kit)

Model 35's

Hoerner
Wingtips

Met-Co-Aire

Increased lift, more
speed, added stability.

$675/pair

35 - V35B,
A36

Tip Tanks

Beryl
D'Shannon

Includes 15 Gal. tanks. GWT
 increase on most models.

$4,500-
$5,750

H35- P35

Engine
Conversion

Beryl
D'Shannon

lO-550-B (300hp)
& 3-blade prop.

$28,000-
$35,000

S35 thru V35

Engine
Conversion

Beryl
D'Shannon

TCM lO-550-B (300hp)
& 3-blade prop.

$22,000-
$32,000

V35

STOL

Sierra
Industries

Drooped wingtips w/exposed
nav lights, includes paint.

$14,500

Model 36's

Speed Mods

Smith Speed
Conversion

Reduces drag, adds speed,
lowers fuel consumption

$14,900

Model 36's

Baggage
extension

Smith Speed
Conversion

Extends baggage area

$5,000

Model 36's

Speedbrakes
(electric)

Precise
Flight Inc.

Increases rate of descent without
airspeed buildup or shock-cooling.

$3,995
(kit)

Model 36's

Engine
Conversion

Beryl
D'Shannon

lO-550-B (300hp)
& 3-blade prop.

$22,000-
$32,000

Model A36

STOL

Sierra
Industries

Drooped wingtips w/exposed
nav lights. Includes painting.

$14,500

Model 55's

Vortex
Generators

Micro Aero-
Dynamics

Reduced stall speed
& Vmc,lower drag.

$2,450

55 A & B

"President ll"
Conversion

Colemill
Enterprises

New IO-550's (300HP), 3-blade
props, increased gross weight.

$88,500

55 A & B

"President 600"
Conversion

Colemill
Enterprises

New IO-520's (300HP), 3-blade
props, increased gross weight.

$76,500

55 C/D/E

Engine
Conversion

Beryl
D'Shannon

 lO-550-Cs (300hp)
& 3-blade props.

$45,000-
$70,000

M55 C, D
E, & 58

Foxstar

Colemill
Enterprises

New IO-520's (300HP)
4-blade Q-tip props, winglets.

$97,750

55 & 58

Gap seals

Smith Speed
Conversion

Higher speed, lower stall,
increased ROC, better roll.

$1,390

55 & 58

Vortex
Generators

V/G Systems

Reduced stall speed
and Vmc, lower drag.

$2,250