2025 Demon Tweeks Motorsport E-Catalogue - Catalog - Page 353
EXHAUST SILENCER PACKING
£95.91
N O ISE RE D U CTI O N
1
3 • Exhaust Silencer
Packing
This unique exhaust packing is
designed for controlled expansion
under heat from the exhaust. This
ensures the silencer is properly
filled, even those with complex
shapes, providing maximum sound
absorption. Installation is simple as
the material can be cut with scissors
and only has to be loosely wrapped,
the exhaust heat does the rest.
• Easy to install
• Proven on road and track
• Reduces silencer skin temps
• Lightweight compared to
traditional wadding
• Supplied in pre-cut sizes to suit
1 • Decibel Slayer
An easy to fit, universal baffle system which inserts into the end of
the exhaust system and clamps onto the tailpipe to reduce exhaust
noise. Originally designed to combat stringent noise limits in the
Britcar race series the Decibel Slayer utilises a perforated tube which
penetrates the tail pipe and has an optimised length to leave exhaust
gas flow unrestricted while effectively reducing the noise level.
Designed to fit tailpipes between 2-4” diameter including oval
with no extra clamps or welding required.
(DBS1) £95.91
Independent test results showing the dB reduction with a Decibel Slayer
fitted.
Test
Test
Without
With
DB
Vehicle
Conditions DB Slayer DB Slayer Reduction
Astra Turbo (Trackday)
Idle
103.8
97.9
5.9
Astra Turbo (Trackday) Fast Idle
109.6
103.9
5.7
Ford Fiesta (Racecar)
Idle
91.9
89.1
2.8
Ford Fiesta (Racecar) Fast Idle
102.0
100.3
1.7
Silencer length
350mm
400mm
450mm
500mm
EXHAUSTS •
NOISE CONTROL
from
3
£13.60
Price per metre
(ECR350)
(ECR400)
(ECR450)
(ECR500)
£13.60
£15.24
£16.83
£19.05
Silencer Packing Quantity Guide
2 • Boa Silencer Packing
2
More versatile than sheet material, the Boa allows oval or intricately
shaped silencers to be filled more effectively. Supplied in one length:
400g packs. One pack will fill a silencer approximately 400mm long x
100mm diameter.
(AFL-BOA-PTX-400)
£18.46
£18.46
Silencer dimensions - Round
O/D
Perf Tube
Length
O/D
100mm
50mm
1m
120mm
50mm
1.5m
140mm
50mm
2m
150mm
50mm
2.5m
Silencer dimensions - Oval
Outer W x D
160 x 100mm
180 x 115mm
220 x 140mm
350 x 250mm
Perf Tube
O/D
50mm
50mm
50mm
75mm
Length
1.5m
2m
3m
8.5m
from
4
£1.06
4 • Exhaust Clamps
Made from electro-plated steel,
there is a size to suit
every requirement.
Size
42mm
45mm
48mm
50mm
52mm
54mm
58mm
60mm
65mm
70mm
75mm
80mm
Part No.
(ECL42)
(ECL45)
(ECL48)
(ECL50)
(ECL52)
(ECL54)
(ECL58)
(ECL60)
(ECL65)
(ECL70)
(ECL75)
(ECL80)
Price
£1.22
£1.22
£1.26
£1.18
£1.20
£1.18
£1.06
£1.16
£1.27
£1.50
£1.40
£1.41
See page 335 for Mikalor Clamps
5
£18.23
6 • Universal High Flow Catalytic Converters
Designed for Race and Rally use with metallic substrates, creating a
free flowing catalyst with an increased catalyst surface area over
ceramic types.
Ideal for high performance applications.
Benefits:
• Lower resistance to gas flow, reduced back pressure
and increased performance over ceramic and non high
flow designs
• Metallic substrate is more resilient than ceramic
core types
• Cost effective, often cheaper than
a replacement manufacturer catalyst
• Excellent emissions reduction
• Greater resistance to light impacts
or water quenching
100 cpsi substrates - give best gas flow.
200 cpsi substrates - required for
OBD2 on board diagnostics.
from
6
£307.01
Universal High Flow Catalytic Converters
5 • Airtec MIL Light Cheater
Overall
Diameter
If you’ve recently fitted a de-cat or high flow sports cat to your car and you
have an engine management light come on, then you need the Airtec MIL
Light Cheater. This Lambda sensor extension can solve engine
management light issues. This removes lambda sensor from the direct gas
flow. It is recommended that a remap is still installed to ensure correct
engine tuning.
Thread Size: M18x1.5 Male and Female
(ATEXHFO4)
£18.23
ALL PRICES PLUS VAT
108mm
121mm
130mm
Overall
Inside
Max HP
Length
Diameter Non-Turbo
with Cones
of end
and End Stubs*
Stubs
350mm
2" - 60.3mm
170bhp
380mm
2.25" - 60.3mm 215bhp
395mm
2.5" - 76 mm
250bhp
Max HP
Turbo#
255bhp
325bhp
375bhp
100 cpsi
Part No.
(SPORTS1)
(SPORTS3)
Welded
Price
200 cpsi
Part No.
Welded
Price
£307.01 (SPORTS6)
- (SPORTS7)
£332.73 (SPORTS8)
£307.01
£313.99
£332.73
• SHOP ONLINE • www.demon-tweeks.com • SALES ORDER HOTLINE • 01978 664468 •
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