Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Flowtech Upright Headers - 11551FLTOverview: Flowtech Headers are the perfect combination of quality and value. These Big Block Chevy Upright headers available in 2 1 4" tube diameters are ideal for even big cubic inch Big Block Chevy engines Features: CNC Mandrel bent tubes provide consistent tubing diameters for smooth flow and increases the cylinder scavenging effect and improves engine breathing Heavy duty 16 gauge 409SS tubing for increased strength and durability 2 1 4 tubing
Overview:
Flowtech Headers are the perfect combination of quality and value. These Big Block Chevy Upright headers available in 2-1/4" tube diameters are ideal for even big cubic inch Big Block Chevy engines
Features:
- CNC Mandrel-bent tubes provide consistent tubing diameters for smooth flow and increases the cylinder scavenging effect and improves engine breathing
- Heavy duty 16-gauge 409SS tubing for increased strength and durability
- 2-1/4” tubing diameter for increased exhaust flow increasing performance and improved throttle response
- Extended 4” collector for maximum strength and exhaust flow
- Extra thick 7/16” header flange for a leak-free seal and maximum strength
- Welded-in collector merge spears to control exhaust gas re-entry into primary tubes
- Center of exhaust port to end of collector length is 33-1/2"
Application:
- 1975-1995 Chevrolet G30
- 1968-1986 Chevrolet C20 Suburban
- 1968-1985 Chevrolet K20 Suburban
- 1979-1995 GMC C2500 Suburban
- 1979-1995 GMC C2500
- 1979-1995 GMC C3500
- 1979-1995 GMC K3500
- 1968-1980 Chevrolet C10 Suburban
- 1975-1986 Chevrolet C20
- 1975-1986 Chevrolet C30
- 1967-1976 Chevrolet Caprice
- 1967-1976 Chevrolet Impala
- 1977-1986 Chevrolet K30
- 1967-1975 Chevrolet Bel Air
- 1967-1975 Chevrolet El Camino
- 1967-1975 Chevrolet Malibu
- 1967-1974 Chevrolet Corvette
- 1988-1995 GMC G3500
- 1988-1995 Chevrolet C3500
- 1988-1995 Chevrolet K3500
- 1968-1974 Chevrolet K20 Pickup
- 1968-1974 Chevrolet K30 Pickup
- 1968-1974 GMC C15/C1500 Pickup
- 1968-1974 GMC C15/C1500 Suburban
- 1968-1974 Chevrolet C20 Pickup
- 1968-1974 Chevrolet K10 Pickup
- 1968-1974 Chevrolet K10 Suburban
- 1968-1974 Chevrolet C30 Pickup
- 1967-1973 Chevrolet Chevelle
- 1968-1974 GMC C25/C2500 Pickup
- 1968-1974 GMC C25/C2500 Suburban
- 1968-1974 GMC C35/C3500 Pickup
- 1968-1974 GMC K15/K1500 Pickup
- 1968-1974 GMC K15/K1500 Suburban
- 1968-1974 GMC K25/K2500 Pickup
- 1968-1974 GMC K25/K2500 Suburban
- 1968-1974 GMC K35/K3500 Pickup
- 1968-1974 Chevrolet C10 Pickup
- 1975-1980 Chevrolet C10
- 1970-1975 Chevrolet Monte Carlo
- 1967-1972 Chevrolet Camaro
- 1967-1972 Chevrolet Biscayne
- 1991-1995 GMC K2500
- 1976-1980 Chevrolet K10
- 1991-1995 Chevrolet K2500
- 1991-1995 Chevrolet C2500
- 1987-1991 GMC R2500 Suburban
- 1987-1991 GMC R3500
- 1971-1975 GMC Sprint
- 1987-1991 GMC V3500
- 1990-1993 Chevrolet C1500
- 1969-1972 Chevrolet Kingswood
- 1975-1978 GMC C25 Suburban
- 1975-1978 GMC C35
- 1973-1976 GMC Jimmy
- 1992-1995 GMC K2500 Suburban
- 1992-1995 Chevrolet C2500 Suburban
- 1992-1995 Chevrolet K2500 Suburban
- 1975-1978 GMC C15
- 1975-1978 GMC C15 Suburban
- 1975-1978 GMC C25
- 1969-1972 Chevrolet Townsman
- 1969-1972 Chevrolet Brookwood
- 1992-1995 Chevrolet C3500HD
- 1976-1978 Chevrolet K5 Blazer
- 1989-1991 Chevrolet R2500 Suburban
- 1989-1991 Chevrolet R3500
- 1989-1991 Chevrolet V3500
- 1976-1978 GMC K25
- 1976-1978 Chevrolet K20
- 1973-1975 Chevrolet Laguna
- 1987-1989 GMC R2500
- 1987-1988 Chevrolet R20
- 1987-1988 Chevrolet R20 Suburban
- 1987-1988 Chevrolet R30
- 1987-1988 Chevrolet V20 Suburban
- 1987-1988 Chevrolet V30
- 1975-1976 GMC G25
- 1976-1977 GMC K25 Suburban
- 1973-1974 Chevrolet G10 Van
- 1973-1974 Chevrolet G20 Van
- 1973-1974 Chevrolet G30 Van
- 1979-1980 GMC C1500
- 1979-1980 GMC C1500 Suburban
- 1973-1974 GMC G35/G3500 Van
- 1969-1970 Chevrolet Nova
- 1973-1974 Chevrolet Blazer
- 1969-1970 Chevrolet Estate
- 1989 Chevrolet R2500
- 1990 Chevrolet V2500 Suburban
- 1976 GMC G35
- 1976 GMC K15
- 1980 GMC K1500
- 1976 Chevrolet G20
- 1968 Chevrolet Chevy II
Specs:
| Application | Big Block Chevy |
|---|---|
| Brand | Flowtech |
| Collector Diameter | 4.00 inch |
| Emission Code | 4 |
| Engine | Big Block Chevy |
| Finish | Natural |
| Header Finish | Natural |
| Header Style | Upright |
| Primary Tube Dia. | 2-1/4 inch |
| Product Type | Headers |
| Tube Material | 409 Stainless Steel |
| Warning | California Proposition 65 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.3 ★★★★★
Based on 954 reviews
Sort
Product Reviews
★★★★★ 5
Tired of bad sleep try this pillow :)
Size: Sapphire Queen
Never owned a nice or expensive pillow finally after a good 25 years of super cheap pillows finally decided to try a nice one and see if there is a big difference and see what all the woot is about anyways in my opinion I am a side sleeper and I now just use this instead of multiple pillows and I can safely say it works very well seems too cool a little and is very comfortable plus bonus they give you extra fluff if you want to add more or replace but straight out of the box was absolutely perfect for sleeping I am insanely picky about it will ABSOLUTELY BUY THIS AGAIN 🥰🥰🥰 firmness absolutely perfect as is
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026
★★★★★ 1
Flattened out a little over a month or using it
Size: Sapphire Queen
Figured I would wait a month or 2 before leaving a review. At first. The pillow was great. Very comfortable. Held up nice. Nice and firm and gave great support. After a month. It started to flatten out. Had to re-fluff it only to have flatted out faster this time. Now no matter how many times I fluff it. It doesn’t give the proper support any longer. I’ve bought 2 of these and they are identical. So it can’t be just a fluke for the 2 i have. I’m regretting the purchase as the price was fair when I bought them. But not any longer as they are not the same.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 26, 2026
★★★★★ 5
Amazing - Stop Scrolling and Buy This Pillow
Size: Queen (Pack of 1), Color: White
I have been an Amazon customer ever since the very beginning, and this is my first review. Not because I haven’t purchased tons of amazing things (and a few bad ones), just never felt the need.
However, I researched pillows for longer than I care to admit, and decided on this one.
I’ve had it for about six months and absolutely love it. No lie, I genuinely look forward lying my big head on it after a long day.
I am a side sleeper, but flip flop all around through the night and it’s great in every position.
Pros:
Stays nice and cool, which is soothing regardless of the time of year.
Has a sort of quilted textured pattern on the zip up cover, gives it a luxury feel, that breaths nicely even when a pillow case is added.
The fill is fully adjustable to your preference.
I knew it came with extra filling but was worried it would not be enough. Wrong. It was very full and I ended up taking some out until it was perfect.
It comes vacuum sealed and suggests it may take some time to fully take shape. However, I found it to be about 90% almost instantly and was sleeping on it a couple hours later.
There was no unpleasant scent sometimes associated with memory foam items.
The foam itself is very nice, a mix of what appears to be shredded and cotton candy cloud like. Very brilliant idea, as it is somehow supportive, soft and firm all at once.
The affordability of this pillow compared to some of the others in this category can’t be overstated.
Oh, and the packaging was very thoughtfully and securely done.
If you are like me, an over thinker, I would suggest just taking this for a spin. It’s amazing.
I’m not a bot, or working for the company. I’m just truly satisfied, love this pillow, and have been sleeping great.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 6, 2026
★★★★★ 5
It's the perfect pillow!
Size: Queen (Pack of 1), Color: White
I purchased this pillow specifically for its customizable fill feature, which allows you to add or remove stuffing to suit your personal comfort needs. Due to the unique curvature of my cervical spine—forward at the neck rather than backward—I require a soft, semi-flat pillow rather than one that is thick or firm. Additionally, I often experience ear discomfort by morning, so a gentler surface is essential.
Upon adjusting the fill, I was pleasantly surprised by the generous amount of stuffing included. There was enough to fill an additional pillowcase, and I estimate it could easily create four to five more pillows. The ability to modify the pillow’s firmness at any time is an outstanding feature that makes it adaptable for a wide range of preferences and sleep styles.
This pillow has exceeded my expectations in both comfort and versatility. I highly recommend it to anyone seeking a personalized sleep experience.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 1, 2026
★★★★★ 4
Good quality pillows overall
Size: King (Pack of 2), Color: White
Got a set of these for my wife and myself as we were struggling with our old pillows. These have some really good qualities and some things we'd like to see changed.
First, the good: These are look and feel like they are high quality and made with good materials. The foam itself has a very nice feel to it. We love the fact they are adjustable to add or remove foam. They come with a pretty substantial amount already in the pillow. We appreciate the CertiPur certification.
Now the improvements or changes we'd like to see: The foam, while feeling great, doesn't bounce back well if you scrunch your pillows, and so every day you have to fluff and reshape the pillow, moreso than some other memory foam pillows we've owned. One side of the pillow is cooled and you can feel that even through the pillow case, and that's a great thing. However, one side is not cooled and we'd have preferred if both sides were made of the cooling material.
Overall, these are good pillows and we are not disappointed with the purchase. They are not, however, our perfect pillows (which do seem hard to find), and at some point in the future will probably make their way to the guest bedroom. We would rate them as some of the better pillows we've tried and feel most people would probably like them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 19, 2025