LogoAlfa.gif (4240 bytes)

 logoChromeSmallOnWhite.gif (6352 bytes)
105/115  Drive Line  Price   List
Flywheel Bolts for 1300/1600/1750
Transmission gear lightening
Clutch Assembly
Limited Slip

  • Click on the thumbnail photos for a larger view, and then use your browser's Back button
  • Automated shopping cart shipping charges are for Domestic shipping only. 
    International customers please inquire for shipping quotes.

Flywheel bolts for 1300, 1600 & 1750 engines.

These bolts have long been unavailable from Alfa.  That means these bolts have been reused over and over for engine rebuilds, and undoubtedly, they are well past their limits for safe use.  In fact, upon close examination, most show serious wear marks under their heads.  They should be replaced with new, but people have reused them because they had no alternative.
These new bolts are custom made replacements by ARP (Automotive Racing Products), the premiere automotive fastener manufacturer.  Using their proprietary processes, these bolts are forged from special aerospace alloys, then heat treated before thread rolling, and machining.  These high tensile strength bolts are rated at 180,000 psi. 
They are far superior to OEM and they are available.  Washers are chamfered to fit the bolt's underhead taper.

Flywheel

Dwg #

Photo

Description

Part #

Pcs/
Kit

Kits/
Car

Price/
Kit

Add to
Cart

 

1750 Flywheel Bolts -.jpg (9501 bytes)

Giulietta & Giulia flywheel bolts
1300, 1600 & 1750 cc engines.

complete kit w/ washers
(8 bolts& 8 washers)
Custom made by ARP, the best.

750FLB

16

1

$99.99

 

Half Moon 1750  -.jpg (8820 bytes)

Giulietta & Giulia flywheel bolt
half moons1300s are too thin and fragile, 1600 & 1750s are thickest
and therefore least
likely to strip
Sometimes available, inquire.

1750-HM

2

1

$59.99

 


Gear Lightening

Long considered to be the ultimate in gear box preparation for the track.  Lightening the gears removes unnecessary rotating mass from the gear train.  The principal benefits that accrue are quicker shifting and longer synchro life.  Performatek undercuts (where possible - this is not feasible on the smaller gears) and cross drills the gears*.   The biggest "bang for the buck" is to lighten 1st, 2nd & 3rd gears on the mainshaft, and 4th, 5th & Reverse on the layshaft.  These synchros see the most use (especially 2nd and 3rd), and they are on the biggest gears, so they have to deal with the biggest disparity in weight & rotation speed.  Having said that, once the box is open, it is not uncommon to have them all done. 
Performatek can also offer a complete transmission rebuild.  It is difficult to give a complete price schedule for a transmission rebuild because it is hard to predict which pieces will be worn beyond acceptable limits. The labor is fairly constant, but the parts need varies widely.  The only way to know is to give the transmission or at the very least, the gear stack, a thorough inspection by a seasoned professional - either your local Alfa technician or by Performatek.   Typically, one or more dog rings will need to be replaced (this actually is the part that grinds on bad shifts).  Also, expect one or more synchros & sliders to be worn.  Of course, the prudent Alfa owner will also prepare for the surprise "issues" that always seem to crop up in a rebuild like this..
Some of these parts can still be replaced by OEM parts, for some, you may have a choice of either OEM or aftermarket parts.  Some parts are NLA and can only be replaced by scavenging less worn parts from used transmissions.  In order for Performatek to inspect the gears, it is recommended that you send the complete mainshaft with gears attached.  If you prefer, you can send the complete transmission (minus bell housing), case and all.  After inspection, we can quote the parts cost for the rebuild.
GEAR OIL must be drained thoroughly.

*In order to perform the machine work, the gears must have dog rings removed - either by you or by us.

Delivery
Gear lightening 2-4 weeks after receipt of gears.
Transmission rebuild - tbd, but typically 2-3 weeks after receipt.

Lightened Gears

Dwg #

Photo

Description

Part #

Price/
Kit

Add to
Cart

Gear before and after -.jpg (16374 bytes)

First Gear, undercut and cross drilled.

105-1GL

$100.00

Gear before and after -.jpg (16374 bytes)

All other gears, 2nd through Reverse,
undercut where possible,
and cross drilled, price each.

105-GL

$75.00

 

Gear before and after -.jpg (16374 bytes)

Shot peen gears, each.

GSP

$30.00

 

Gear before and after -.jpg (16374 bytes)

R&R dog rings, price each.
required for each gear lightened

DR-RR

$15.00

 

Gear before and after -.jpg (16374 bytes)

Inspect and rebuild gear stack
labor only

TRBL

$300.00

 

Gear before and after -.jpg (16374 bytes)

Inspect and rebuild in case
labor only

TRBL-C

$395.00

 

Gear before and after -.jpg (16374 bytes)

Transmission rebuild, complete

TRBC

TBD   
Inquire 

 

Gear before and after -.jpg (16374 bytes)

Transmission/parts
Shipping instructions and cost

TBD   
Inquire 

 

Clutch Assembly

The Alfa 105/115 clutch assemby can also yield performance gains via lightening.  The stock clutch disk weighs close to 3 pounds and for any engine output up to about 180hp, should be adequate, and is easy to drive on the street.  However, if your engine will be delivering more power than that and/or be primarily a track car, then other clutch options become preferrable and realistic.  We can provide clutch disks with greater friction levels and clamping forces.  Your pressure plate can be modified to give more clamping force if necessary.  Contact us and we can review your needs and options. 
The flywheel can be lightened significantly which will greatly reduce rotating mass to give more immediate throttle response and rob less power from the rear wheels.  For the most gain, the flywheel can be replaced with a very lightweight aluminum or steel flywheel.  
For the replacement flywheel, you will need to specify the ring gear (tooth count) required.

Clutch Assembly and Flywheel

Dwg #

Photo

Description

Part #

Price/
Kit

Add to
Cart

Organic disk, heavy duty springs, closed
barrel captured. Gives excellent grip big power when used with reworked pressure plate.
Retains excellent driveablity for street.
Heavier than stock disk.

CD-HPO

$175.00  

fiber_carbon_sprung02-.jpg (12524 bytes)
reverse side

Kevlar clutch disk,
sprung hub.  Excellent for highly modified engines, track/race use. Crisp engagement, long life. Excellent driveablity for street.
Heavier than stock disk.

CD105-8CF

$275.00

 

6button_sprung F-.jpg (13344 bytes)
reverse side

6 pad sintered ceramic friction material.
sprung hub.
  Quick engagement & disengagement requires full driver attention, but manageable for street use.
Heavier than stock disk.

CD105-6SC

$249.00

 

4button_sprung02-.jpg (12629 bytes)
reverse side

4 pad sintered ceramic friction material.
sprung hub.
  RACE ONLY -  quick engagement/disengagement requires full driver attention. Heavier than stock disk.

CD105-4SC

$249.00

 

UNSPRUNG
HUB

Although Performatek generally recommends
against it, all performance clutch disks
can be ordered with unsprung hubs.

Inquire

 

Alfa 2.0 web -.jpg (12563 bytes)

Clutch centering tool.  Ensures
proper disk alignment.
for 105 & 115
available for Alfa, Fiat, Lancia, inquire

115CCT

$10.00

 

Resurface, and balance
OEM  clutch/flywheel assembly

105FW

$195.00

 

Resurface, lighten and balance
OEM  clutch/flywheel assembly

105FW-L

$285.00

 

OEM Clutch/Flywheel Assembly
Shipping Instructions and costs

Inquire  

 

Aluminum Flywheel-.gif (3204 bytes)

High Performance, light weight
replacement Flywheel
*need to specify ring gear tooth count*

105FW-R

Inquire  

 


Limited Slip Differential

The limited slip differential is an important contributor to maximizing performance from your Alfa.  In slippery or marginal traction circumstances, it allows some power to be fed to the wheel that is normally unloaded and spinning wildly. Balancing the torque applied to the rear wheels increases the chance that one or both can find traction and keep the car moving.  Of course, this feature becomes increasingly important as engine output increases.  This type of differential relys on friction clutch disks to transfer the torque from one axle to the other.  Over time, these disks wear out and the differential effectively reverts back to an open differential.  The result is big throttle incudced wheel spin in the wet, or in uphill corners, etc.  When this happens, the clutches need to be replaced. 
For those who want more, the differential's performance can be increased to give even better performance. In the standard Alfa Romeo limited slip differential, the limit is set to about 25%, however, by rearranging the disk stack, the slip limits can be almost doubled.  
Performatek can perform either a standard rebuild or a high performance rebuild. We will also inspect the differential carrier bearings, and notify you if one or both need to be replaced.
We have recently received limited slips that were so bad that even the spacer disks had to be replaced.  These rebuilds obviously ended up costing more.  Highly unusual, nevertheless, be prepared for any eventuality when they are opened and inspected.

Limited Slip Differential

Dwg #

Photo

Description

Part #

Price/
Kit

Add to
Cart

LSD Q,D. 63 -.jpg (12526 bytes)

Limited slip rebuild Labor only.

105LSD-R

$85.00

LSD Q,D. 63 -.jpg (12526 bytes)

Standard rebuild
Limited Slip Clutch Disks,
Standard rebuild, 2 required, price each -
Hi perf rebuild,4 required, price each

105-LSD

$115.00

 

LSD Q,D. 63 -.jpg (12526 bytes)

Limited Slip Clutch Disks,
Shipping instructions and costs

Inquire 

 

All prices FOB Sherborn, MA.  Pricing and availability subject to change.

Back to Alfa Driveline

Home | Online Catalog | Cosi Speciali | How To Order | About Us | Contact Us | Hall of Glory | Links