Comp Cams Gm G3 Xfi 260 Hr1
SKU: 18317863295

Comp Cams Gm G3 Xfi 260 Hr1

$218.67 $242.97
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Ships within 48 hours · Estimated delivery Jul 6 - Jul 11

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Description

Comp Cams Gm G3 Xfi 260 Hr1XFIT Xtreme Truck, G3 XFI 260 HR15 Significant Gains in Mid & Upper RPM Range HYDRAULIC ROLLER: 4. 8L 5. 3L Chevrolet GMC Truck. Significant gains in mid & upper rpm range. Works best with programmer. Lifter Type: Hydraulic Roller Engine Family: GM LS Gen III IV 8 Cyl. '97 Current Three Bolt 4. 8 5. 3 5. 7 6. 0 6. 2 7. 0L Engines Cam Family: XFIT Xtreme Truck Specifications Intake Exhaust RPM Range: Valve Lash: Valve Timing: Duration: Lobe Separation:

XFIT Xtreme Truck, G3 XFI 260 HR15 
Significant Gains in Mid & Upper RPM Range

HYDRAULIC ROLLER: 4.8L/5.3L Chevrolet/GMC Truck. Significant gains in mid & upper rpm range. Works best with programmer.

Lifter Type: Hydraulic Roller

Engine Family: GM LS Gen III/IV 8 Cyl. '97-Current Three-Bolt 4.8/5.3/5.7/6.0/6.2/7.0L Engines

Cam Family: XFIT Xtreme Truck

Specifications Intake Exhaust
RPM Range: Valve Lash:
Valve Timing: Duration:
Lobe Separation: Duration @ .050" Lift:
Intake Centerline: Valve Lift:
Lobe Lift:
Valve Timing @ 0.006 Lift:
Exhaust
Closes -13
ATDC
Opens 45
BBDC
 111
Intake
-8 Opens
BTDC
34 Closes
ABDC


Vehicle Fitments:

Year Make Model Submodel
2001 - 2004 Avanti II Base
2008 - 2009 Buick LaCrosse CX, Super, CXL
2008 Buick LaCrosse CXS
2004 - 2007 Buick Rainier CXL
2004 - 2005 Buick Rainier CXL Plus
2012 Cadillac CTS 3.0L, 3.6L
2011 - 2014 Cadillac CTS Coupe
2010 - 2015 Cadillac CTS Performance
2009 - 2015 Cadillac CTS Premium, Base, Luxury, V
2013 Cadillac CTS V Luxury
2014 - 2015 Cadillac CTS Vsport Premium, Vsport
2002 - 2014 Cadillac Escalade Base
2009 - 2013 Cadillac Escalade Hybrid
2010 - 2013 Cadillac Escalade Hybrid Platinum
2011 - 2014 Cadillac Escalade Luxury, Premium
2008 - 2014 Cadillac Escalade Platinum
2012 Cadillac Escalade Special Edition
2007 - 2014 Cadillac Escalade ESV Base
2008 - 2014 Cadillac Escalade ESV Platinum
2011 - 2014 Cadillac Escalade ESV Premium, Luxury
2012 Cadillac Escalade ESV Special Edition
2007 - 2013 Cadillac Escalade EXT Base
2011 - 2013 Cadillac Escalade EXT Luxury, Premium
2007 - 2013 Chevrolet Avalanche Base
2013 Chevrolet Avalanche Black Diamond LS, Black Diamond LTZ, Black Diamond LT
2007 - 2012 Chevrolet Avalanche LT, LTZ, LS
2002 - 2006 Chevrolet Avalanche 1500 LT, Base, Z71, LS
2002 - 2003 Chevrolet Avalanche 1500 On Road Edition, North Face
2003 Chevrolet Avalanche 1500 WBH
2004 - 2006 Chevrolet Avalanche 1500 Z66
2011 - 2012 Chevrolet Camaro 1LT, 2SS, 1SS
2010 - 2015 Chevrolet Camaro LT, LS, SS
2014 - 2015 Chevrolet Camaro Z/28
2012 - 2015 Chevrolet Camaro ZL1
2011 - 2017 Chevrolet Caprice PPV
2009 - 2012 Chevrolet Colorado WT, Base, LT
2008 Chevrolet Corvette 427 Limited Edition Z06
2006 - 2013 Chevrolet Corvette Base, Z06
2010 - 2013 Chevrolet Corvette Grand Sport
2013 Chevrolet Corvette LT, 427
2011 Chevrolet Corvette Z06 Carbon
2009 - 2013 Chevrolet Corvette ZR1
2003 - 2014 Chevrolet Express 1500 LS, Base
2006 - 2014 Chevrolet Express 1500 LT
2003 - 2019 Chevrolet Express 2500 LS, Base
2006 - 2019 Chevrolet Express 2500 LT
2005 - 2019 Chevrolet Express 3500 LS, Base
2006 - 2019 Chevrolet Express 3500 LT
2008 Chevrolet Impala 50th Anniversary Edition
2006 - 2009 Chevrolet Impala LT, LS, Police, SS, LTZ
2016 - 2017 Chevrolet LCF 3500 Base
2006 Chevrolet Monte Carlo LTZ
2006 - 2007 Chevrolet Monte Carlo SS, LT, LS
1999 - 2013 Chevrolet Silverado 1500 Base, LS, LT
2002 Chevrolet Silverado 1500 Custom
2004 - 2013 Chevrolet Silverado 1500 Hybrid
2007 - 2013 Chevrolet Silverado 1500 LTZ
2003 - 2006 Chevrolet Silverado 1500 SS
2002 - 2013 Chevrolet Silverado 1500 WT
2010 - 2013 Chevrolet Silverado 1500 XFE
2004 Chevrolet Silverado 1500 Z71
2007 Chevrolet Silverado 1500 Classic SS, Hybrid, LS, WT, LT
1999 - 2000 Chevrolet Silverado 2500 Base, LS, LT
2015 - 2019 Chevrolet Silverado 2500 HD High Country
2010 - 2019 Chevrolet Silverado 2500 HD LT, LTZ, WT
2015 - 2019 Chevrolet Silverado 3500 HD High Country
2010 - 2019 Chevrolet Silverado 3500 HD LT, LTZ, WT
2014 - 2017 Chevrolet SS Base
2003 - 2004 Chevrolet SSR Base
2000 - 2012 Chevrolet Suburban 1500 Base
2000 - 2014 Chevrolet Suburban 1500 LS, LT
2006 - 2014 Chevrolet Suburban 1500 LTZ
2004 - 2007 Chevrolet Suburban 1500 Z71
2010 - 2013 Chevrolet Suburban 2500 LT, LS
2016 - 2019 Chevrolet Suburban 3500 HD LT, LS
2000 - 2012 Chevrolet Tahoe Base
2008 - 2013 Chevrolet Tahoe Hybrid
2000 Chevrolet Tahoe Limited
2000 - 2014 Chevrolet Tahoe LS, LT
2007 - 2014 Chevrolet Tahoe LTZ
2012 - 2014 Chevrolet Tahoe PPV, SSV
2000 - 2009 Chevrolet Tahoe Z71
2006 - 2007 Chevrolet Trailblazer B, LS, A
2006 - 2008 Chevrolet Trailblazer SS, Base, LT
2003 - 2006 Chevrolet Trailblazer EXT LS, LT
2003 - 2004 Chevrolet Trailblazer EXT North Face
2009 - 2012 GMC Canyon SLE, SLT, Base, WT
2005 - 2009 GMC Envoy Denali, SLT, SLE
2005 - 2006 GMC Envoy XL Denali
2003 - 2006 GMC Envoy XL SLE, SLT
2004 - 2005 GMC Envoy XUV SLE, SLT
2003 - 2014 GMC Savana 1500 Base
2006 - 2014 GMC Savana 1500 LS, LT
2009 - 2013 GMC Savana 1500 SL
2003 - 2013 GMC Savana 1500 SLE
2003 - 2019 GMC Savana 2500 Base
2007 - 2019 GMC Savana 2500 LS, LT
2010 - 2013 GMC Savana 2500 SL
2003 - 2013 GMC Savana 2500 SLE
2004 - 2019 GMC Savana 3500 Base
2006 - 2019 GMC Savana 3500 LT, LS
2010 - 2013 GMC Savana 3500 SL
2004 - 2013 GMC Savana 3500 SLE
2002 - 2005 GMC Sierra 1500 Base
2001 GMC Sierra 1500 C3
2002 GMC Sierra 1500 HT
2005 - 2013 GMC Sierra 1500 Hybrid
1999 - 2013 GMC Sierra 1500 SLT, SL, SLE
2002 - 2013 GMC Sierra 1500 WT, Denali
2010 - 2013 GMC Sierra 1500 XFE
2007 GMC Sierra 1500 Classic SLE, Hybrid, WT, SLT, Denali, SL
1999 - 2000 GMC Sierra 2500 SLT, SLE, SL
2015 - 2019 GMC Sierra 2500 HD Base
2011 - 2019 GMC Sierra 2500 HD Denali
2010 - 2019 GMC Sierra 2500 HD SLE, SLT
2010 - 2014 GMC Sierra 2500 HD WT
2015 - 2019 GMC Sierra 3500 HD Base
2011 - 2019 GMC Sierra 3500 HD Denali
2010 - 2019 GMC Sierra 3500 HD SLE, SLT
2010 - 2014 GMC Sierra 3500 HD WT
2007 - 2012 GMC Yukon Base
2010 - 2013 GMC Yukon Denali Hybrid
2008 - 2013 GMC Yukon Hybrid
2006 GMC Yukon SL
2000 - 2014 GMC Yukon SLE, Denali, SLT
2001 - 2014 GMC Yukon XL 1500 Denali
2006 GMC Yukon XL 1500 SL
2000 - 2014 GMC Yukon XL 1500 SLE, SLT
2010 - 2013 GMC Yukon XL 2500 SLT, SLE
2007 - 2009 Hummer H2 Adventure, Luxury
2004 - 2009 Hummer H2 Base
2007 Hummer H2 Special Edition
2008 - 2010 Hummer H3 Adventure, Base, Luxury, Alpha
2009 Hummer H3 Championship Series
2008 - 2009 Hummer H3 X
2010 Hummer H3T Adventure
2009 - 2010 Hummer H3T Base, Alpha
2003 - 2006 Isuzu Ascender Base, LS
2003 - 2005 Isuzu Ascender Limited
2004 - 2005 Isuzu Ascender S
2008 - 2009 Pontiac G8 Base, GT
2009 Pontiac G8 GXP
2005 - 2008 Pontiac Grand Prix Base, GXP
2005 - 2007 Pontiac Grand Prix GT
2005 Pontiac Grand Prix GTP
2006 - 2009 Saab 9-7x 5.3i, 4.2i
2008 - 2009 Saab 9-7x Aero
2005 Saab 9-7x Arc, Linear
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 18317863295

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4.3 ★★★★★
Based on 2485 reviews
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Product Reviews
A
Verified Purchase
AmazinFrank
Omaha, US
★★★★★ 5
Very good product at a fair price
Model: SLH20025
Very good sound deadener and heat shield, it is a bit sticky to work with, but easy to shape and cut
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
E
Verified Purchase
Eric Caldeira
Louisville, US
★★★★★ 5
I wish I had Siless 20 years ago!!!
Model: SLH20025, Model: SLH20025
I have installed all kinds of insulation in vehicles over many years. I only needed to purchase 2 boxes to complete the entire interior siding of my 2025 chevy express, what a great value! I wanted to insulate my locksmith van for sound and heat. The sound reduction virtually eliminated the road noise. These panels also look amazing. It got up to 110F in the sun with the doors closed. After adding Siless insulation the temperature maxed out at 97F. That is a massive difference. Plus, I didn't even finish with the roof before testing. Siless Hybrid 3in1 was extremely easy to cut and adhere onto metal panels. I'm impressed with the quality of the individual panels and the adhesive is not toxic smelling compared to some others. My favorite thing about these panels is you can actually take them off and readjust them before they finally stick and they do not leave any black residue behind when you pull them up to adjust them. All I needed was a heat gun, knife and a roller to complete this job. The size of each panel is perfect, you can handle them with ease. I probably won't need your product again for a while, but when I do I will definitely be back.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 21, 2025
M
Verified Purchase
Mark Kadrich
Carnegie, US
★★★★★ 5
Works well and is easy to install.
Model: SLH20025, Model: SLH20025
I was sound and heat insulating a generator bay in my class A RV so I did three tests before and during material application: I did a sound level test to see how effective the material was for my application, a "stickiness" test, and a flammability test. This was indoors on a dry 78°F day. From beginning to end, the entire process, including testing, took 5 hours to install 25 sqft or material in a very complex area. One hour for cleaning, 3 hours for installation, and 1 hour for test setup and testing. Using a sound meter, I took before and after readings and determined that I reduced the sound level by 2.2 db (40% energy decrease) with a noticeable decrease in sound and frequency. The generator bay is located under the master bedroom in the aft portion of the coach. The sound went from a rattling, vibrating generator noise to a more tolerable low level rumble. The material was easy to apply. I did some testing prior to application and determined that surface preparation is key. I cleaned my painted metal surface and then degreased with acetone and the material stuck well. Be careful and purposeful when you apply the material because once it was stuck to the metal, it was quite difficult to remove or reposition. Since it was going to be installed into a gasoline powered generator bay located under our sleeping quarters, I did some flame testing to determine the level of risk. Although not highly flammable after installation, my testing revealed that the PE used will catch on fire under certain circumstances. In order to reduce the risk, I used aluminized duct tape to ensure that all the edges were sealed and the PE was not exposed to direct flame in the event of a fire. I also decided to install an automatic fire extinguisher as an added precaution. In all fairness there should be one installed in the generator bay anyway. All in all, I am very satisfied with the product and the results. I have recommended this product to my other RV owner friends.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 13, 2025
J
Verified Purchase
Josh
Chelsea, US
★★★★★ 5
Great product. Best value i could find
Model: SLH20025
I'm using talk to text, so forgive any grammatical and spelling errors. I ordered this product after doing a bit of research on sound dampening materials. I had been doing car stereo for quite some time since my teens. Itook a break for 20 years or so. I'm now 40 and back in the day there was dynamat. And that was about it. as irecently bought a new 2017 F350 crew cab. I wanted to put in a new stereo system and being that it was my dream truck. I was going to put in my dream stereo. But before I could do that, I needed to start with the sound deadening. I looked into today's leading product and found a company called resonx. Had taken their place as king of the hill in sound deadly. I researched their products and found the materials they were built from and Silas was the closest match at the best price I used Silas Max. First, then Silas 3 and 1 hybrid over that on all exterior panels. Then, on the interior panels. I used the 3 and 1 hybrid . on the floor I used Silas Max. Then, the 3 and 1 hybrid, then Silas liner over that the car is incredibly quiet . As far as sound dampening and deadening, it works very well for the money really can't beat it. Do your homework no How and where to apply it? And you really can't go wrong or about $400. I did. What would have cost me easily? Two thousand in other brands highly recommend the product prep work.Is everything do your homework?Do it right and you will be happy with this stuff
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
W
Verified Purchase
william scott
Bozeman, US
★★★★★ 4
Not simple, nor easy
Model: SLH20025
I wanted to add sound proof material to the bare metal areas on the floor of my Toyota Tundra. The area behind the front seats had a haphazard application of sound deadening material. There were several complications to the project which may come up in other vehicles. First is the floor covering which had plastic pillars underneath to support any weight on the cover. The sound deadening material had to be cut out so these pillars would rest on the bare metal of the floor. This required a lot of cutting with a utility knife and at times heavy scissors. The instructions say to make a template before cutting the material and I did this for the driver's side. This doubled the amount of time needed to install it. On the passenger's side I laid the rectangles of material with the backing on and pressed the floor covering onto the material. This showed where the support pillars were, which I then cut out. Second is peeling the backing off the material. This can be very difficult as the adhesive sticks to it. The backing came off in multiple pieces and sometimes took 5 minutes for one piece. They say to wear gloves when handling the material but this is impossible when trying to get the backing off. Third is pressing the material onto the metal. The instructions say to use a roller, but this was impossible for the irregular surface I was working on. The hand is the best tool to press the material on. The material seems to be of high quality and I expect it will reduce the road noise in the cab.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2025

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