 | Home > Maintenance & Modifications > Terrafirma Defender Td4 de-cat down pipe |
 
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| Alive Tuning Member Since: 01 Mar 2010 Location: Louth Posts: 609   
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Whether you buy your 409 grade mid pipes or decats from Bell, IRB, Allisport, or myself, they all come from the same factory, and are made to the exact same spec. It's just a matter of price, and quality of customer service.
Interestingly, some peoples premium range of pipes, are our budget range!  |
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29th Sep 2010 3:12pm |
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| Sonic3d Member Since: 28 Jan 2008 Location: Ross on Wye Posts: 1505 
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Stainless or mild steel the decat pipe is the one that lasts the longest so grade of material does not make any difference Unless you want to polish it
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29th Sep 2010 4:41pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19578
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29th Sep 2010 5:27pm |
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| Alive Tuning Member Since: 01 Mar 2010 Location: Louth Posts: 609
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I don't see it as an issue of how long a section of pipe lasts, but rather how well it performs. Obviously being at the hot end, it'll give many years of service no matter what grade of steel it's made from. 304 grade will scrub up nicely, but will yellow over time due to the heat.
409 grade is also more resiliant than 304 grade, to extreme temperature changes, like when being driven through deep water. We've used 1.6mm thick 304 stainless steel on our premium decats, which is heavier than that used on the 409 pipes, and so causes less resonance in the cab, and is of course well capable of being quenched in water! In addition to this, our 304 pipes use very high quality flexi sections, which maintain a near constant internal diameter, where as the 409 budget pipes use a (cheaper) smaller, visibly more restrictive flexi. The radius and quality of the bends are considerably better on the 304 grade systems as well. This does make a difference to performance, although it is a relatively small one. As I said, it's a quality thing! Whether you want to polish it, is of personal preference I'm sure. |
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30th Sep 2010 12:43am |
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| Bomber82 Member Since: 20 Oct 2009 Location: Alessandria - Italy Posts: 216  
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Got the 304 grade from Gary (Alive Tuning) and I'm very pleased with it!!
Both with standard and remap tune at low range the engine is more smooth.  Matteo
Defender 110 Td4 SE MY 09 |
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14th Sep 2011 10:04am |
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| lrmaniac Member Since: 04 Feb 2010 Location: Lisboa Posts: 762  
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Hi ... Just to my knowledge
What are the benefits of fitting a de-cat down pipe and/or a silencer replacement pipe ? Will it only works if the car has a remap or works fine on a standard Defender ? Thanks! Regards
Joao '10 Land Rover Defender 110 CC '08 BMW F800GS '64 SIIA Forward Control '69 SIIA 109 ZA CKD _____________________________________________ You have the right to remain silent. Anything you say will be misquoted, then used against you. |
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22nd Sep 2011 10:33am |
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| Naks Member Since: 27 Jan 2009 Location: Stellenbosch, ZA Posts: 2591  
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Allows the exhaust gases to exit more quickly from the engine, allows the turbo to spool up quicker, so a bit more va-va-voom at low speeds
You can do it without a remap, IMHO best bang-for-buck performance mod on any turbodiesel. -- 2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear 2015 Range Rover Sport V8 Supercharged 
Defender Puma Workshop Manual: https://bit.ly/2zZ1en9 Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ |
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14th Oct 2011 9:37am |
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