Decibel Slayer Bolt On Exhaust Noise / Decibel Reducer Insert
The Decibel Slayer - Exhaust DB reducer insert is designed to be a removable baffle for your tail pipe acting like a silencer.
It works on round or oval tail pipes by simply bolting down onto the tail pipe. No drilling of the tail pipe is required like other types on the market, meaning this is a discreet solution that can be removed easily. The Decibel Slayer has 4 studs that hold it on with a friction fit. No modification is necessary when using the Decibel Slayer, simply bolt on and enjoy your track day. No unsightly and awkward clamps!
Originally designed for the Britcar Series to combat the ever increasing noise limits, the Decibel Slayer is designed and manufactured here in the UK by a top level motorsport exhaust specialist (supplier to the former WRC Team MINI and much more). They looked at other over engineered items on the market and realised there is no need to have noise baffling material, the noise reduction properties of a correctly acoustically engineered perforated tube being adequate. This intelligent design means that the perforated tube which penetrates the tail pipe has an optimised length to leave exhaust gas flow unrestricted. Therefore using Decibel Slayer will have a negligible effect on your power output.
Designed to fit from 2" to 4" diameter pipes. This also includes oval silencers as included in the kit are different length threaded studs to fit both tail pipe types.
Reduction Examples (our own test results):-
Competition Astra GSI Turbo - Fast idle at 4,500rpm.
| Conditions | Without DB slayer | With DB Slayer | Decibel Reduction |
| IDLE | 103.8 | 97.9 | 5.9 |
| FAST IDLE | 109.6 | 103.9 | 5.7 |
Standard Ford Fiesta - Fast idle at 4,500rpm.
| Conditions | Without DB slayer | With DB Slayer | Decibel Reduction |
| IDLE | 91.9 | 89.1 | 2.8 |
| FAST IDLE | 102.0 | 100.3 | 1.7 |
| Brand | Decibel Slayer |
| MPN | DBS1 |
UK Mainland Delivery Prices
| Delivery Type | Cost | Estimated Delivery Time |
| Standard Delivery | from £1.33 | 2-3 working days from day of despatch(Excludes weekends and Bank Holidays) |
| Express Delivery | from £1.68 | 1-2 working days from day of despatch(Excludes weekends and Bank Holidays) |
| Special Delivery | from £12.54 | For any next working day delivery order before 4.30pm Monday to Thursday. For any weekend delivery order before 4.30pm Friday |
| Click & Collect | from £7.62 | Collect your parcel from a local post office. 2-3 working days from day of despatch(Excludes weekends and Bank Holidays) |
For international shipping please visit our delivery page.
For information about returning an item please visit our returns page.
Our Payment Options
Online we currently accept payment from the methods listed above including a wide range of finance options. In store we also accept payment in the form of cash and gift vouchers.
Finance Options
In order to get the kit you want, when you need it, without ruining the family finances we offer a highly flexible range of finance options to help you get the best products on your bike now rather than at the end of the season when you've saved up the cash to make the purchase. There are even interest free options which effectively spread the cost without costing you any extra.
D.T.(Automotives) Limited T/A Demon Tweeks is authorised and regulated by the Financial Conduct Authority and is the broker and not the lender. Our FCA registration number is 689896. D.T.(Automotives) Limited offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance and Klarna. Credit is provided subject to affordability, age and status. Minimum spend applies. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority.
